I'm currently re-reading The Mom Test by Rob Fitzpatrick while also re-reading Start Small Stay Small by Rob Walling. As I've been doing this, I've tried to think of any other books like these that I have re-read or had the desire to re-read, but I can't think of any. I've re-read both of these books multiple times, though. So it got me wondering what books you all have where you find yourselves re-reading them multiple times.