thought provoking books like shutter island books books like that did you understand now ? 

I just finished <em>The Sirens of Titan</em>, by Kurt Vonnegut, and I found it to be both funny and thought-provoking.

what kind of books?

Yes, pick a book, 'cause I love reading, but I don't know what do you mean by provoking? (I'm not sure if the word is correct).

Pick a book :)