To me all books are meaningful in some way or another, although obviously some are more meaningful than others. One of my all time favorites is the Yann Martel book, Life of Pi. I think that most people have either read the book or at the very least watched the movie, but here is a summary just in case; It's about a young Indian boy who immigrated to America along with his family and the animals from the zoo that they operated. Unfortunately the boat sinks during the trip and Pi is left stranded on a lifeboat with an assortment of wild animals, including a massive Bengal tiger that is named Richard Parker. On one level the book is about the journey Pi has to make to survive and inhabit the same space as a ferocious animal, but it also has a deeper meaning that only becomes clear towards the end of the book.