Project Hail Mary: Book vs the 2026 Film

Andy Weir followed The Martian with Project Hail Mary, and many readers think it is his best. The film adaptation arrives in 2026 with Ryan Gosling — so should you read it first? Absolutely.

What it is about

A lone astronaut wakes on a spaceship with no memory of who he is or why he is there. As his memory returns, he realises he is humanity’s last hope against an extinction-level threat — and he is very much not a heroic type. To say more spoils the book’s best surprise, which is also its emotional heart.

Why the book comes first

Project Hail Mary is built on problem-solving, internal monologue, and one reveal that works best when you discover it cold. Film can show the spectacle, but the joy of the novel is being inside the narrator’s head as he works each puzzle out. Read it unspoiled.

If you love it

Weir’s writing is warm, funny and rigorously scientific. For your next read, see our guide to what to read after Project Hail Mary, or our list of the best space opera series for bigger-canvas sci-fi.

The verdict

Read the book before the credits roll. This is one adaptation where going in spoiler-free is genuinely worth it.