* I read the Bible out of curiosity and ended up joining a church, so that's pretty consequential.
* Moby Dick and Journey to the West were probably the most sheer enjoyment I got out of books
* Learning C# 3.0 by Jesse Liberty is extremely dated at this point, and was dated even when I read it, but was the first book that made me "get" many basic OO concepts and taught me a language I've gotten a lot of professional mileage out of
* Skiena's Algorithm Design Manual and Sedewick/Wayne's Algorithms. Most people do algorithms in school. I learned about it while I was already writing programs for money all day, which means it deeply impacted the way I think about my work.
* Discrete Math with Applications by Epp -- I didn't read it all the way through but gave me the foundations to actually understand what the hell the books in the last bullet were talking about
* Battle Cry of Freedom by MacPherson was the first really meaty historical book I read. Turns out I like those a lot.
So many more but this seems like a reasonable place to stop for this discussion.