Programmer-turned-novelist Andy Weir has now cranked out two bestselling sci-fi novels that Hollywood could not resist.

Let's compare and contrast the two versions!

Has Project Hail Mary left you craving more sci-fi? We've rounded up Andy Weir's other work, from Artemis to The Martian.

We took Andy Weir to a science museum and watched him nerd out with an astrophysicist and about making "Project Hail Mary" with Ryan Gosling.

Project Hail Mary explained: what Andy Weir’s novel is about, who wrote it, how Rocky fits in, and why the book became a sci-fi bestseller.