So I finished Project: Hail Mary last week and whilst I can't confess to liking it nearly as much as The Martian, it's still a worthy read if you're into that sort of thing.
Credit to Andy Weir here, because based on the first third of the book I could quickly see this thing spiralling out of control, but it didn't, and he kept it very grounded (no mean feat for a book set in space).