The books that I read leave a mark on my soul. I feel like every time you read a good book you get more interesting, smart, brave etc. Every book also carries its own lesson that makes you a better person.
Sideways Stories from Wayside School, by Louis Sachar. (Avon Books, Humorous episodes from the classroom on the thirtieth floor of Wayside School, which was accidentally built sideways with one classroom on each story.