Wow the ending information was just so hard to wrap my mind around. I also can't believe what happened to Dan both during the jump and after. This book was just a whirlwind of emotions. This was my favorite time jump as the 300 is one of my favorite times. I can't wait to see what Dan ends up doing with the information gained as well as how he will handle the time jumps next.

I've said it before about this series, but I'll say it again—this book and series is something I would have loved to have when I was younger. I'm a big fan of Greek history so this was my favorite entry so far. The dialogue is well-written and doesn't feel like it's trying to force “teen speak.” It builds well on the pre-established conflict from the first three books. And the twists! They just keep coming. There were so many tense moments in this book. Can't wait for the next one to see what Dan makes of them. Another great entry in the series.

I received an ARC through NetGalley from the publisher in exchange for an honest review.

5 Stars! I really love this series! This is book 4 in ‘A Jump in Time’ series & it could be a standalone but would be better off being read in order. It’s been a minute since I read book 3, but luckily the author gives info that jog the memory. If you enjoyed the movie ‘300’, this is a book to read. I feel smarter having read this book and it didn’t bore the heck out of me like most history books do. A lot is fictional but it also has many historical facts that are interesting to read about. Did you know Spartan boys were sent away to basically a military school at the age of 7? Entertaining, wonderful main characters, funny at parts, tragic at times, unpredictable, and informative. All in all, totally worth reading, especially for middle and highschoolers but great for adults as well. I usually like romance books but I really enjoy Andrew Varga’s series. He writes so well & everything flows together perfectly. Can’t wait to read the rest of the series! Highly recommend the whole series. You’ll really enjoy it and you’ll feel smarter for having read it! It’s a win/win!
*I received this book at no charge & I voluntarily left this review.*

Learning history and having it brought to life so vividly are my favorite aspects of these books, and The Spartan Sacrifice did not disappoint! I got emotional a few times during inspirational speeches, kind gestures, character deaths, etc. The writing really sucks me into the story.
The romance and Dan's inconsistent intellectual reasoning are my least favorite parts of the books. They're largely realistic depictions, but they make me cringe with either how awkward the romantic bits can be or how implausible some of Dan's deductions or lack thereof can be. I think these may be acceptable to the target demographic (younger readers), as I'm in my 40s so not really who these books are for! I still enjoy the overall premise and especially the history lessons, even though these aren't aimed at me as the audience.

I liked this installment of the jump in time series, I enjoy greek history in general and getting to see Leonidas in one of these novels was a lot of fun, I liked the extra twists and turns that happened, in a lot of the other books they're straight forward and not as twisty, but I liked what the author did. It hooked me and made me want to know more about the time jumper brotherhood, and what Victor was doing! Can't wait for the next I'm really excited to see. With each book it honestly gets better.

I very much enjoyed the spartan sacrifice though admittedly less so than the others in the series. My primary reason for this being that the book seemed to focus more on relationship development, which in itself would have been fine, but I felt like the characters underwent this development already and were redoing the same thing over again, particularly involving Sam. There were a few small things that the absence of in previous books leads me to wonder if the publisher made some requirements.

Still the book is vastly superior to the vast majority of young adult fiction these days. Certain parts of the stories such as Dan’s “come and take it,” molon labe line and Dan being given a linothorax, I was particularly excited to see. I do feel like the author should note, to match more the historical accuracy of the rest of the texts, that no matter how awesome it looks, I can say from experience that you cannot break arrows of a shield easily, most certainly not several in one stroke. Overall I enjoyed it and would recommend it to others.

Another brilliant instalment by Andrew Varga.
This one got me emotional very early on because it took me back to an ancient history class that I loved when I was 11 years old. Just like Dan becomes giddy after realising he is seeing some of his heroes, I was almost choked up.

It was a good book with some interesting twists: some unexpected, while others strongly foreshadowed (especially the big stuff at the end).

I love the writing style. It is friendly and accessible, keeping me entertained, helping me visualise what is happening, with a good mix of descriptions and dialogue. The suspense is provided in a perfect amount for my taste.

I am really curious how Dan will navigate his way out of the hole he dug himself into. I can see a few possible events, and I cannot wait to read the fifth book.

The sense of mystery is perpetuated. While some questions are answered, more arise. The characters are fairly believable, neither one-dimensional, nor too complex to take away from the interesting plot.

It was fascinating to learn more about Victor's evil plan. Listening to people who believe in it can be very polarising. It makes me reflect on how people in the real world start to have extreme views. This, combined with some of Dan's choices, can really question the readers' ethics and morals.

There is also a level of complexity brought by the fact that the bad guys want to fix the time stream, while also making small changes (addressed by the plot to be of "little consequence") as well as trying to take huge action in the present. I wonder if they fear a chrononaut to visit from their future to fix what I can only describe as the glitch they are setting up. But maybe there is no glitch cause Dan will stop them anyway.

The time travel element is interesting. It is a tool for an interesting story. I advise readers again to not become obsessed about time travel being written "the right way". There is no right way because, as far as we know, time travel is not possible. The only right way of writing about it is to set it up in a way that stimulates readers' imagination. And mine is stimulated. Having said that, the approach used in this series treats time both as a thing that can be revisited, but also as a linear concept with events being visitable only once. If the glitch isn't fixed when it should, the chrononauts cannot try again by jumping back in time repeatedly.

Happy reading!

Dan's latest jump takes him all the way back to ancient Greece, days before the famous Battle of Thermopylae.

With the stakes higher than ever and Dan questioning the lengths he can go, he and Sam are deeper and deeper entangled in Victor Stahl's net.

As the story progresses, some missing puzzle pieces of the overarching plot are falling in place, but said plot doesn't appear particularly well thought and has several huge holes in its reasoning.

This can be overlooked though since the series has a light adventure vibe from the start - what cannot be ignored for me 4 books in, is the cringe, cheesy teen love triangle plotlines. The less said about this, the better. It does a huge disservice to the series.

Thank you NetGalley for the ARC!

The 4th novel in a phenomenal YA Sci-Fi/Fantasy series that is one part historical war drama and one part time travel mystery, this book focuses a little less on the relationship between MCs Dan and Sam and a bit more on the other time travellers and their backgrounds. The major historical battle of Thermopylae (Sparta and Greeks vs. Persians) is the highlighted military affair and, like all of the previous books, the storyline is outstanding, realistic, and moving. The attention to detail and the research on Spartan culture and the battle scenes are apparent in nearly every page. The writing style flows quickly and is fast-paced without ever missing a beat. The Spartan chant/poem gave me chills. I love it and if you have enjoyed the other books in the A Jump in Time series, you'll want to read this one too. One of the best series of its kind. I suggest reading the entire series in order for the best experience. Applause for the gorgeous cover art too. Recommended.

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This book takes you right back to Ancient Greece in a really engaging way. It’s a quick, easy read with a few twists—some surprising, others a bit predictable—but still fun to follow. What stood out most was how well the author captured Spartan and Greek battles and history. You can tell he did his research, and it really adds depth to the story. Great pick for fans of historical fiction with action and heart.

Many thanks to NetGalley, Imbrifex Books/Imbrifex Audio and the author for the ARC/ALC of this book in exchange for an honest review.

This has to be the first time in this series I felt like, 'Immediately 4 stars.' Not only were the stakes much higher, but also there was significant growth in Dan's personality, perspective, and moral compass.

Dan is getting better at this whole being a 'normal' teenager thing, with school and girlfriend, all while waiting for a major history event that will let him go back in time and do something about Victor's plan of world domination. But when that happens, it (as usual) does not go as planned—this time even more so. Dan and Sam end up in Ancient Greece right when the Spartans and the Greeks are at the cusp of the historical battle of Thermopylae. Not only do they have to fix the time glitch but also follow through with pretty much the only plan they have against Victor.

This one had much more emotional depth, especially with Dan finally going through the 'why me' thoughts. The aftermath of all these events on the relationships between all characters is pretty believable, and the twist, let me tell you, was twisted. The narrator, as always, was convincing and dependable.

Thank you NetGalley for the e-ARC!

This one I did enjoy a whole lot better than the previous one. At first the Sparta, I love ancient Greece and Rome. Secondly the the plot was mainly in the past, what I like the most in these books. I dont want to spoil the book as it is the 4th one, but I would say that maybe we finally will get over with the love triangle.
Cannot wait for the continuation.
4 stars from me

I've been waiting a long time for this, and now Dan and Sam's Time Jumps are finally continuing :-)
I've been following their adventures since book 1 and am looking forward to the sequels every year.

About the plot: There are actually two plots here that are quite cleverly interwoven. The main plot that connects all the books in the series is the secret society of "Time Jumpers," whose members are equipped with devices that allow them to travel through time. But not just for the fun of it; rather, it's the other way around: whenever there's a "glitch"—some kind of unwanted slip-up—in the flow of time, the devices call the Time Jumpers, and they hop right there and have to set history straight so that everything runs smoothly again. The time travelers never know in advance where they'll end up, and therefore spend their lives training for all eventualities.... Yes, and one of the jumpers, Victor Stahl, mentioned in the blurb, has recognized his chances for world domination and is the dark force that must be fought. The fight against Victor runs through all the books, and in each book, the evil one's perfidious plan is revealed a few steps further...

The second plot, of course, is always the current time travel adventure of Dan and Sam, the two more or less involuntary jumpers. This time, they land in ancient Greece in the year 480 BC, and the Battle of Thermopylae is imminent. In case that doesn't mean anything to anyone: that was the legendary battle of Sparta's "300," the Spartan superheroes who defied the Persian superpower.... Sam didn't know it either, and Dan, who certainly had received plenty of history lessons from his father, also mainly remembers the epic Hollywood film of the same name, which gave him various fanboy moments.....now it's time to figure out which "glitch" needs to be fixed, and soon Dan finds himself in the middle of the central battle....and that's a far different story "in real life" than in the cinema seat....

And of course, we have a tender romance in there – we remember, Samantha and Daniel have grown closer in the last few books, but Dan now has a steady girlfriend at home, Jenna, and has to decide what he actually wants.

So, let's get to my reading experience: it was once again extremely cool. Super exciting, tons of action, lots of emotion, grippingly written. Considering that this is actually a young adult book (Sam, Jenna, and Dan are 17 years old), I'm absolutely thrilled. The author grabs you from page one, and you're in the flow.

And you can also tell that the author is a historian; the books are all historically very accurate. Very precise. Everything here is absolutely spot on, and I think that's great. I completely buy into everything he says; it's really funny, actually.

The characters develop further from book to book, and I think you can definitely read this book on its own—you're given enough background information on everything—but of course, it's more exciting to jump in from the beginning. So, read all four books! I very much recommend reading them!


Many thanks to Netgalley and the publisher for the brilliant review copy! I enjoyed it :-)

Thank you to NetGalley and the publisher for a copy of this book in exchange for an honest review.

This was a great continuation of this series. I really enjoyed that this was set in Ancient Greece and love where this series is going. I can’t wait to see what awaits Sam and Dan, especially with that plot twist at the end. This series is so great and I really feel like I am traveling back in time when reading these books.

A modern teen is thrust into the heart of the Battle of Thermopylae in this fast-paced, time-travel adventure. Though part of the Jump in Time series, The Spartan Sacrifice stands well on its own—I never felt lost and now plan to read the earlier books.

I read and listened to this while traveling, and it made the downtime something to look forward to. The story was very good—engaging, vivid, and surprisingly suspenseful. Andrew Varga brings the ancient world to life in a way that’s both creative and grounded in history.

Mark Sanderlin delivers a strong, engaging narration that matches the tone and urgency of the plot. A great listen for fans of historical fiction with a twist.

Thanks to NetGalley and the publisher for providing a copy in exchange for an honest review.

#TheSpartanSacrifice #AndrewVarga #MarkSanderlin #AudiobookReview #HistoricalFiction #NetGalleyReviewer #JumpInTimeSeries

Dan and Sam are back to continue their fight as time travelers who are trying to stop Victor Stahl's plan to have time travelers to take over the world. This jump takes them to Greece just before the legendary Battle of Thermopylae. Since 300 is Dan's favorite movie, he feels more than ready to deal with whatever issue caused the glitch. This time Dan's choice ends up causing a ripple effect across time, and now Dan and Sam are in more danger than usual. Once they manage the glitch, they return to their own time where their mission to destroy Victor's plans takes on a whole new urgency. Secrets are revealed and now Dan feels that he is running out of people to trust. This fourth book in the series did not disappoint. I can't wait for the next adventure.

I’ve always enjoyed learning about ancient history, the older the better! In Andrew Varga’s “The Spartan Sacrifice” I learned about the “Battle of Thermopylae”, featuring the ancient Spartans who were some of the most fierce and feared warriors of the ancient world. Dan, a 21st century teenager, time travels to this battle to “fix” a glitch in history, because if pivotal points in history change, then so does our present change. This historical fiction details Dan and his fellow time-traveler Sam’s efforts to make sure that history doesn’t change.

This is a book I didn’t want to put down. Yes, the premise of time travel is a bit far fetched, but the historical descriptions of the clothing, food, weapons, and history details are spot-on. The teenage characters are believable. Anyone who enjoys history would like this book as well as any young reader who likes action.

I wish to thank Imbrifex Books for gifting me this ebook and selecting me to review it on NetGalley. All opinions are my own.

#TheSpartanSacfice
#ImbrifexBooks
#NetGalley
#HistoricalFiction
#AncientHistory
#TimeTravel

Thank you to Netgalley, the publisher, and the author for providing a free e-arc in exchange for an honest review.

This series has been quite enjoyable, and I feel like if I read them when I was a teen, it would have been a favorite series. This time, we travel back in time to Leonidas and his army, facing off against the Persians and Dan and Sam getting pulled into the battle to help. This time though, things really don't go as planned, leading to Dan possibly being trapped in time. We also get more story with the villain Victor Stahl, but find out that there is more involved in this sinister time traveling society than what we thought.

The plot was great, and action scenes were good. The only issues I had was the drama between Dan, Sam, and Jenna. Obviously, these are still teens/young adults, and we know how relationships at that age can be. It was just cringey at times and annoying. Also it was a little short compared to the other books. Overall, I still enjoyed the story and look forward to the rest of the series.

This was a fun continuation in the time jumpers' series. I loved learning more about Sparta, the battle at Thermopylae, and the Persians. The amount of research that went into making the historical setting so vivid and unforgettable is undeniable. There is always that one person who Dan meets in the past who has such an influence on the shape of events, and this one is no exception. I also liked how the plot seems to focus more on the modern day conspiracy vs. resolving time travel glitches now that Dan and Sam are pretty competent time jumpers. I could take or leave most of the recurring side characters, who don't really add much to the story. Hearing more about time jumper lore is always a plus, and this book delivered. I am apprehensive about how a miscommunication/concealing information trope appears to be incoming, but will see how everything ends up playing out. Dan and Sam both had some good growth and I am eager to see when and where they go next.

This book was hard for me to read. It may be because of the war based storyline or the fact that I started with book 4 instead of book 1.

I was able to follow the plot and understand what was happening, so it is constructed well enough to be a stand alone. I do think it would be best to start at the beginning.

Dan faces several moral and ethical dilemmas as he struggles to figure out how to save the world. Anyone who loves time travel and Ancient Greece/Sparta is likely to enjoy this current edition in the series.

While not extremely gruesome, it does describe battles and several important characters die. I would recommend it for teens and older.

I really enjoyed this story. I think this is the best one in the series so far. There was good character growth and the characters were easy to relate to. Older youth will enjoy the adventure in this book.

A spoiler free review. The time jumper book continues and this time in ancient Greece. Dan and Sam are really going through the ringer this timeThis riveting time travel book is very fast paced filled with twists and turns and plots twists..I love how each book is connected to true historical events. This author is very clever and knows how to capture the readers attention clearly. Plus I felt it was also an emotional roller coast ride hat just kept me turning the pages with anticipation. Another fascinating book I thoroughly devoured and highly recommend!


Thank you to the publisher and Netgalley for the arc in exchange for an honest review.