The pacing jumps around quite a bit, I also felt it didn't quite stick the landing. I'd recommend though if you're looking for a single fantasy book instead of another long series

How to write like Andy Weir:

Problem • Humor • Solution • Humor • Problem • Humor • Solution • Humor • Problem • Humor • Solution • Humor • Problem • Humor • Solution • Humor • Problem • Humor • Solution • Humor • Problem • Humor • Solution • Humor …

Also don’t bother with character development.