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Gemini

Stepping Stone to the Moon, the Untold Story

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Pub Date Nov 11 2025 | Archive Date Nov 25 2025

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Description

From the bestselling author of Apollo 13 comes the thrilling untold story of the pioneering Gemini program that was instrumental in getting Americans on the moon.

Without Gemini, there would be no Apollo.

After we first launched Americans into space but before we touched down on the moon’s surface, there was the Gemini program. It was no easy jump from manned missions in low-Earth orbit to a successful moon landing, and the ten-flight, twenty-month celestial story of the Gemini program is an extraordinary one. There was unavoidable darkness in the programthe deaths and near-deaths that defined it, and the blood feud with the Soviet Union that animated it.

But there were undeniable and previously inconceivable successes. With a war raging in Vietnam and lawmakers calling for cuts on NASA’s budget, the success of the Gemini program—or the space program in general—was never guaranteed. Yet against all odds, the remarkable scientists and astronauts behind the project persevered, and their efforts paid off. Later, with the knowledge gained from the Gemini flights, NASA would launch the legendary Apollo program.

Told with Jeffrey Kluger’s signature cinematic storytelling and in-depth research and interviews, Gemini is an edge-of-your-seat narrative chronicling the history of the least appreciated—and most groundbreaking—space program in American history. Finally, Gemini’s story will be told, and finally, we’ll learn the truth of how we landed on the moon.

From the bestselling author of Apollo 13 comes the thrilling untold story of the pioneering Gemini program that was instrumental in getting Americans on the moon.

Without Gemini, there would be no...


Advance Praise

“A superbly written and thoroughly researched story of early spaceflight that isn't just for space buffs but for every reader who loves tales of true adventure. You can almost smell the hydrazine fumes as you turn the pages of Jeffrey Kruger's amazing story of America's second spacecraft that ultimately gave us the moon.” —Homer Hickam, bestselling author of Rocket Boys

"Jeffrey Kluger—the best author ever at capturing both the technical and human aspects of space travel—tells the amazing and, up until now, untold story of the Gemini program, the program that developed the technology, experiences, and people needed to successfully land the first humans on the moon... A must-read not only for space enthusiasts, but also for any person seeking inspiration from the greatest adventure ever accomplished by humanity." —Mike Massimino, Columbia University professor and former NASA astronaut

“A superbly written and thoroughly researched story of early spaceflight that isn't just for space buffs but for every reader who loves tales of true adventure. You can almost smell the hydrazine...


Available Editions

EDITION Other Format
ISBN 9781250323002
PRICE $32.00 (USD)
PAGES 304

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Average rating from 19 members


Featured Reviews

What an amazing book! I've always been fascinated with NASA and astronauts. The author provided the historical background regarding the often-forgotten achievements of Gemini. Jeffrey Kluger's writing provided facts, but also some humorous situations that kept the book even-keeled. I visited NASA this past May and I'm always in awe of all of the men and women who made space travel possible.

This is the first book that I've read by this author but it won't be the last!

I was provided a complimentary copy of the book from St. Martin's Press via Netgalley. All thoughts and opinions are my own.

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A very thrilling story the people and the technology development needed to make it to the moon. Jeffrey Kluger writes as if this is an adventure novel, well researched and entertaining to read.

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I devoured this book! When my son was going through his physics and astronomy stage I read Kluger's Apollo 8--another winner--and this was every bit as absorbing, with its share of thrilling and moving moments.

Kluger goes in depth on the missions between Mercury and Apollo, as well as how Kennedy Space Center came to be. Having recently visited Cape Canaveral, I was sorry I hadn't read this beforehand. Next time I am definitely shelling out for the big tour.

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4 stars. What an utterly fascinating book. I loved every page and learned so much. This is a must-read for everyone.

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When readers ask me for a book with straight facts, some insight into the historical participants that were not very well known, a good chronology, nondragging, great pacing that almost reads a sci-fi/suspense thrilling book about Space Race/NASA progress and history, I recommend this author.
Easy to read and understand, I loved some of the previous titles. After watching the satirical almost dark comedy show (Space Force) I've noticed that the show had a lot of research done (now reading this book I realize that some of the absurd comical but also sad moments drew from reality/history) and inspiration taken from the previous 60s-ish programs so I was curious to the leading missions (many terrible moments led to progress, shouldn't be forgotten) of the Gemini program. This makes a perfect read for STEM readers/enthusiasts (YA up) and perfect Father (family) Day gifts.

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I was surprised by how much I enjoyed this book! Everyone always talks about Mercury and Apollo, but Gemini tends to get lost in the shuffle, even though it was the real testing ground for everything we needed to get to the Moon. Rendezvous, docking, long duration spaceflights... Gemini was where astronauts learned how to do all that.

Kluger does a great job balancing the technical side of things with humor and storytelling. The early chapters dive into the Mercury program and even trace the Redstone rockets back to their roots as V-2s, which is wild. Once we hit Gemini, the pace picks up, and Kluger brings the missions to life with funny, sometimes tense anecdotes (like the crash test dummies leaving astronaut shaped holes in the ground; grim but somehow still hilarious).

What I really loved was how Kluger captured the personalities of the astronauts. Their blunt, dry back and forth with ground control was both funny and emotional. These were real people risking their lives to figure out what worked in space, and what didn’t.

If you’re a space nerd, you’ll get a kick out of this. If you’re not, you’ll still walk away with a much better understanding of how we actually made it to the Moon. Gemini might’ve been the "middle child" of NASA’s early programs, but this book proves it deserves just as much attention.

Highly recommend!

Thank you to NetGalley, Jeffrey Kluger, and St. Martin’s Press for the eARC of this book.

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First, I want to thank both NetGalley and St. Martin’s Press for the ARC of Jeffrey Kluger’s gripping book Gemini: Stepping Stone to the Moon, the Untold Story. From intro to epilogue I was entertained with stories of bravery and mystery to personality traits and well timed humor.

Perhaps Kluger’s greatest strength is his ability to share individual astronauts’ quirks, both positive and negative, that attach the reader to the man performing life threatening experimentation in space. The curt comms between astronaut to ground crew are often humorous, poignant and powerful.

Structurally, I enjoyed learning more about the oft overlooked Gemini program and missions in their natural progression. So aptly titled stepping stone that it be, I will be going full space nerd and continuing straight into the Apollo programs for my next read. Great book. I have been sharing informational nuggets from it for days now.

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Both the Mercury project and the Apollo program live on in memory as the key stepping stones to the moon, but between the two was the Gemini project with its 19 launches that bridged the gap between "we got a man to orbit the Earth!" and "we sent men to the moon with a lander, separated while orbiting, landed on the moon, explored, took off from the moon, docked with the orbiting spaceship, and flew back to the Earth".

The Gemini project accounted for 19 launches, with 10 crewed missions, as NASA and its many contractors figured out an endless parade of engineering challenges, from seat design to batteries, landing control systems to docking with another vessel in space, space walks, and so much more.

There were successes and failures, even life-threatening dangers. The project tragically lost two of its astronauts when Elliot See and Charles Bassett crashed their fighter jet into a McDonnell Aircraft building near the St. Louis Airport while attempting to land during terrible weather. Most of the Gemini astronauts went on to become part of the Apollo program too, including Neil Armstrong, Buzz Aldrin, Pete Conrad, Jim Lovell, Frank Borman, and Mike Collins.

With all of this history, however, there's just not much available about the Gemini project and its many milestones in the Space Race. Enter "Gemini" from author and long-time NASA aficionado Jeffrey Kluger. If you're a space nut like me - I've been fascinated by NASA for decades - you'll love the details and information about obstacles encountered and overcome. Even the most casual readers will find Kluger's breezy style and superb research result in an eminently readable book. Highly recommended.

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Another great history of the US Space Program by historian Jeffrey Kluger. The often overlooked Project Gemini is forgotten between Project Mercury and Project Apollo, but without it the steps need to reach the moon would have been unproven. Gemini shares the history of the missing piece of the journey to the Lunar surface and details many firsts of the Space Program including spacewalks, longer space missions and docking in orbit. Highly Recommended!

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I am a bit of a space nerd, so this book was right up my alley. Kluger takes a look at the Gemini program, which he makes a case is the sadly overlooked sibling between the Mercury and Apollo programs. It was interesting to read about the people that shaped the space program, some of whom are famous and some who aren't. Kluger does a great job of putting these events in their historical context while also showing the feeling of urgency and excitement around the space program.

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It’s a rare book that can have me holding my breath for a tense moment. Al Michaels’ recount of the Miracle on Ice is the last one I can recall. Even when I know the outcome - like Apollo 13 (I recently found a copy of Mr. Kluger’s <i>Lost Moon</i>, now on my “Space shelf”, but haven’t gotten to it yet. Must remedy that.) - sometimes an author can write something in a compelling way that… well, grabs me. And the Introduction did just that, with Gene Cernan’s spacewalk. . Then it settles down to a fine accounting of the oft overlooked but critical program with the NASA pronounced name of Gem-in-ee.

I eat this stuff up. I grew up in this era and I was two months shy of five when the Cernan spacewalk happened and I remember listening to the coverage of it with my father (he recorded it, a couple of other Gemini missions and definitely the moon landing on reel to reel tape - no video recording at home back then!) Yes, I remember it. I still had a hard time keeping the NASA pronunciation in my head, as opposed to the astrological. (In Latin, it should probably be ghemenee.)

Mr. Kluger actually covers the entire 1960s space programs, Mercury in somewhat less (but still full enough) detail than the subject, and throws in an epilogue of Apollo flights. I liked getting to know more about the astronauts (and administrators). Their peccadilloes and their senses of humor.

Gus Grissom: “What, the journalist wanted to know, would be the most dangerous part of the mission? Grissom regarded him the way he'd regard a fly that had gotten through the screen door of his Houston home and was buzzing peskily around his head.
‘The part between liftoff and landing,’ he responded.”

Mr. Kluger’s storytelling is engaging and as noted above, prompts me to read more from my TBR space shelf. I appreciate getting an advance review copy from the publisher through NetGalley.

For NetGalley: I am not yet a fan of the NetGalley reader. Like the not preferred Kindle, it takes too many steps to make a note (drag to highlight, tap “highlight”, tap on the note icon, tap *again* to bring up the keyboard.) And there is no way to export the notes. Swiping from too far left trying to go back a page pops me out of the book.

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