What is a good synonym for the word thought - provoking?

Im doing a book report and I have to describe a book (Prep by Curtis Sittensfeld) using adjectives. I'm trying to say that the story talks about many things that the reader can relate to. Is their a specific word that means relatable??? Is thought-provoking okay cause I could stretch it and say that b/c the reader can relate to the story, you think more deeply and blahblahblah...