If You Loved Project Hail Mary, Read These Next

If you finished Project Hail Mary and immediately needed something to fill the hole it left, you are not alone. We talked about it on the podcast and the response was the same across the board: readers want more of that specific feeling. The isolation. The problem-solving that actually makes you feel smart for following along. The moment where something shows up and nobody knows what to do about it. The friendships that form because there is literally no other option.

The bad news is nothing is exactly Project Hail Mary. The good news is several books come close, and most of them fly under the radar compared to the titles that usually get recommended. These are the ones we keep coming back to.

The Collapsing Empire by John Scalzi

The interstellar network that connects human civilization is failing, and almost nobody in power believes it yet. Scalzi writes space opera the way it should be written: fast, funny, and propulsive, with characters who are too smart and too stubborn to do the easy thing. If you liked the way Weir lets his protagonist think out loud through a crisis, Scalzi does something similar but with more political chaos and significantly more profanity. Laura has read almost everything Scalzi has written and this series is a good entry point if you haven't tried him yet. The snark is load-bearing.

The Calculating Stars by Mary Robinette Kowal

An extinction-level event forces a space race nobody was ready for. The protagonist is a mathematician and pilot who understands exactly how bad the situation is before anyone else does, and spends most of the book trying to make people listen. The problem-solving is grounded and specific in the same way Project Hail Mary is, and the stakes feel real because Kowal does the work of making you understand them. This one wins the Nebula, the Hugo, and the Locus Award, which is not nothing.

An Absolutely Remarkable Thing by Hank Green

Something shows up overnight in cities around the world. Nobody knows why. The protagonist films herself with one of them, posts it, and wakes up famous in a way she did not plan for and cannot control. The mystery at the center of this book is genuinely interesting and the way Green structures the puzzle is satisfying without being tidy. It hits the first contact energy of Project Hail Mary from a completely different angle, which is part of what makes it worth reading.

Sphere by Michael Crichton

A science team gets sent to the bottom of the ocean to investigate something they weren't supposed to find. This is classic Crichton, which means the setup is efficient, the tension is real, and trust starts breaking down at exactly the wrong moment. If you want that Project Hail Mary feeling of a small group of people dealing with something genuinely unknown and trying not to get each other killed in the process, this is the one.

The Darkness Outside Us by Eliot Schrefer

Two astronauts on a rescue mission. They do not trust each other. They have to anyway. This one is quieter than the others on this list but the claustrophobia is intense and the relationship at the center of it earns every page. The mission is not what either of them thinks it is, and figuring that out alongside them is most of the experience. Project Hail Mary readers who responded most to the Ryland and Rocky dynamic will probably respond to this one.

Sleeping Giants by Sylvain Neuvel

Alien tech nobody understands turns up in pieces across the globe and a team gets assembled to figure out what it is. Laura read this one and remembers liking it, which for a book that came out several years ago and stuck around in memory anyway says something. It's structured as documents and interviews rather than traditional narrative, which sounds gimmicky but works. The sense of discovery is the whole point and it delivers.

Binti by Nnedi Okofor

The shortest entry on this list and the most purely about what happens when two civilizations that have no framework for understanding each other are forced into contact. Binti leaves home, something goes wrong, and connection becomes the only way through. It's a novella, which means it does what it needs to do without overstaying. If you want the Project Hail Mary first contact feeling in about two hours of reading, this is it.

If you read Project Hail Mary and immediately wanted more of that specific ache, start here. And if you've already read any of these, come tell us which one hit hardest.

FAQs

What makes a book feel like Project Hail Mary?

Usually a combination of things: isolation, high stakes problem-solving, first contact or unknown phenomena, and a relationship that forms out of necessity. Books that hit all of those notes at once are rarer than you'd think.

Is The Collapsing Empire a standalone?

No, it's the first book in the Interdependency trilogy. All three books are out so you can read straight through without waiting.

Do I need to read Sleeping Giants in order?

Sleeping Giants is the first in the Themis Files trilogy. Starting from the beginning is the right call.

Which of these is most similar to Project Hail Mary?

The Calculating Stars probably comes closest in terms of scientific grounding and stakes. The Collapsing Empire is closest in tone and voice.