Ryland Grace wakes up and doesn't remember anything. Not his name, not where he is or how he got there. He takes inventory. He's nude and in what appears to be a hospital bed. He has tubes going everywhere. What in the world has happened to him?

He manages to get out of bed and then realizes he isn't alone. There are two other beds but both of those occupants is dead, long dead. He starts to realize; he isn't in a hospital but on a space ship and is awakening from an induced coma. Slowly, in the hours following, he starts to retrieve more memories. He is on a mission. Alien bacteria are eating the sun's energy, cooling Earth at a catastrophic rate. That cooling is happening everywhere in the observed solar system. He has been sent on a mission to a far away star where the bacteria don't seem to be destroying the planet in an attempt to find a solution.

But he's just one man now. Then the impossible happens. Suddenly, there is another ship. Another ship? Aliens! Eventually Grace meets the alien, a spiderlike creature he names Rocky. Rocky is on the same mission, trying to find something that will defeat the bacteria. Slowly, over weeks, the two research the problem and build a relationship. Can they be successful?

This is a book that will appeal to a wide range of readers. Want hard science and math? It's in there. Want a heartwarming story of character relationships and intergalactic cooperation? It's in there. Want a thill a minute adventure story? Weir has you covered. The reader will finish the book excited to have been taken along on such an amazing journey. This book is recommended for science fiction readers.

Profound, compelling, perfectly detailed. I've had a hard time reading books after finishing Project Hail Mary because they simply aren't as incredible. As a person in STEM, I found the science of this book to be fun and the diction is easy to read. It also appealed to emotional and existential facets that made it a well rounded read.

While it took me a long time to get into the book, about half way through I found I just could not put it down. So, even though it had a slow start with a lot of info dumping, I really loved this book in the end.

A lone "lost in space" crew member awakens to find his crew mates dead and no memory of what happened or why he is there. Where is there? Turns out only he can save his planet from destruction, but must he sacrifice himself? A great read from the author of "The Martian." Well-paced and well-constructed. My thanks to the author and NetGalley for a complimentary copy.

Project Hail Mary is my favorite book of the year and one of my top favorite books of all time. Andy Weir write amazing characters. The dynamic between Rocky and Ryland was amazing. Who knew these two could have such chemistry together from being from literally two ends of the spectrum but Andy Weir does it. I was crying by the end of the book. I did not want it to end. Please make this into a movie!

“I’d have to do the math to know for sure but — I can’t help it, I want to do the math right now.”

Love love love this book! Thanks to Net Galley and Andy Weir for an ARC in exchange for my review!

Science teacher Ryland Grace is an astronaut with the task to save Earth from algae that are destroying the sun. While only knowing like 30% of what Ryland was talking about at any given time, it's hard not to get wrapped up in his enthusiastic discussions about science. This is a compelling an entertaining read that can get quite dark in places, but I loved the unexpected friendship and ending.

Exactly what I wanted out of a good summer sci-fi read. This may be Weir’s third published novel, but it is a direct spiritual successor to The Martian. Come for the astronaut adventure, stay for barrage of chaos and successive problem solving. It’s the same brand of “show-your-work” sci fi that leads the reader through mountains of calculations in an approachable, almost casual narrative voice.

It’s tough to write a full review without spoilers honestly, because so much of what makes the story stand out are bits that the reader and the protagonist are figuring out together, even the backstory is revealed as a slow stream of flashbacks and revelations. There’s something for everyone: whether you are drawn to the astrophysics, engineering, microbiology, climatology, or interstellar apocalypse. Let’s just say it exists somewhere in the Venn diagram of Ludlum’s Bourne Identity, Crichton’s Andromeda Strain, and Chiang’s Story of your Life (Arrival). Which is why I loved it, obviously.

Okay, so, this was my first Weir book … and I loved it! Definitely gonna go back and read The Martian now. This was a bit of a trek. The pacing felt wonky in a couple places, where it kind of slowed down to a crawl and I felt my attention waning. That being said, though, there were freaking plot twists and I absolutely loved it. The characters felt familiar and easy to root for, and they wormed their way into my heart. There’s a nice balance of science and math for the nerdy readers and explanations of the aforementioned for the less math-inclined (like myself). So it was pretty easy to follow along with, either way. I can’t recommend this one enough! It was fabulous.

I absolutely loved this book. I laughed, I cried. I'm kicking myself for not reading it sooner, but I'll definitely be checking out other books by Andy Weir. I went into this one fairly blind and would recommend doing the same,

My first experience with Andy Weir's work was going with my grandfather Charlie to see THE MARTIAN. Charlie was a troubleshooter on the Viking Project: a brilliant engineer whose heart and mind battled constantly whenever faced with fiction. He could indulge in high fantasy and swashbuckler films, but true hard sci-fi was beyond him. His mind wouldn't accept any suspension of disbelief that required outright rejection of a known fact. Asimov's laws of robotics weren't feasible; a computer can't work that way; AI is unlikely to get that realistic.

Throughout the movie, he'd start to raise these complaints, only to be cut off by the movie itself. "See, he can't do that, it would cause an explosion" — followed immediately by an explosion. After the movie, we asked him for his opinion. "Other than us being ready to send a manned mission to Mars," he said, "everything checked out." I think he saw himself in the movie's heroes: brilliant minds aware of, but not distracted by, the inherent beauty and romance of science. Who could take joy in it while still taking it seriously enough to save a life.

I wish I could have shared PROJECT HAIL MARY with him, seen how he took to the friendship between Dr. Grace and Rocky. If THE MARTIAN took joy in science, PROJECT HAIL MARY sings it a Broadway love song. Reading Weir's books as a person who doesn't understand every process described is like listening to your best friend talk about their favorite thing: you don't need to get every concept, you only need to feel the resulting pride and happiness. Is it brilliant that he's worked out long-distance travel, first contact, and a sun-eating parasite in minute detail? Of course. What's more brilliant is our heroes linked, against all the odds of the universe, by their intellect and drive and excitement.

It's rare for me to find a book that's genuinely worth all the hype it gets, but this is on that extremely short list.

Earth is in serious danger! Ryland Grace is the only survivor of the team that was sent into deep space to find a way to rescue all of the inhabitants of earth. But he cannot remember what his mission is. As his memory begins to return to him little-by-little, time is running out for the inhabitants of earth.

I love this book! MARTIAN was awesome, and this one is as equally remarkable! It is amazing to me how Andy Weir can make a fictional world peopled with fictional characters with fictional dilemmas, seem so real. This book is amazingly fun!

PROJECT HAIL MARY is an unforgettable adventure of nonstop excitement. I highly recommend this book!

4 stars for Rocky!! Make no mistake, every star this book gets, it gets for Rocky-- I was very undecided on this book right up until I met him. But dang was it worth it. A man attempts to recover memories of how he wound up on a last ditch mission to save Earth from an alien microbe in this sci-fi novel. It falls into some of the issues Weir has had before--over explaining his science and not a strong enough editorial hand-- but overall I really enjoyed it. Especially Rocky. All the stars for Rocky.

Probably one of the top 3 books I have ever read. Andy Weir is beyond an author, he straight transports you into the book the second you open it.
This book was so good that I purchased it for my family, and a few of my friends, who love sci-fi.
Perfect in every single way.

Project Hail Mary is an awesome book! The characters were awesome, I loved the plot, and like the Martian, the humor was spot on. Definitely a big fan of Weir’s writing!

I first read Weir when The Martian came out. His latest novel is a wild tale about a high school science teacher who wakes up in a different star system with no memory of how he got there. The rest of the story is all about how he uses science and engineering to save the day. It’s a great book, fun read, Everything I've read by him has been great so far.

This book was OUTSTANDING. I absolutely loved it!!! Totally pulled me in on Page 1, and I could not put it down. Imagination, cleverness and emotion all wrapped into one story that transcends time and space. I enjoyed the enthusiastic writing and creative plot about an astronaut who wakes up and has not only forgot his name, but also what mission he is supposed to be on. Everyone should read this amazing book! Do not miss this one!!

This books length was intimidating, but even with that and all the science lingo, I was hooked. I was excited each time I got to pick up this book. I loved how the author wove in humor throughout the story, just as he did in THE MARTIAN. I loved the comical relationship between the main character and rocky. The science made sense, even though I am not someone with a science degree. I do wish we had a little more at the end, because I feel like it wrapped up quickly for such a long book. I enjoyed it and look forward to reading his future books!

Andy Weir does it again! While the first half of this book was slow moving, I thought the sections with Rocky were great and I loved where the story went.

I really enjoyed Mr. Weir's first book and was so excited to get this copy to read. Unfortunately, for me it just didn't have the same pull as his first book. I read the whole book, hoping that at some point I would fall into the story. It never happened. I felt the story was a bit disjointed, which kept kicking me out the world he was trying to show the reader, and I couldn't empathize with any of the characters, much less the protagonist.

I hate writing negative reviews but this book was not what I was hoping for from Mr. Weir.

I have read and loved Weir's previous titles, so I had high expectations for this book. It didn't disappoint. I love space and sci-fi, and the cover first drew me in, but the spectacular story and stellar writing kept me reading way too late into the night! Weir is now on my auto buy list.