The Life of Pi by Yann Martel. This was really a very very good book. It makes you ask questions and think about possible answers (at least it did me). It is a book about religion but not any one specific religion and not in any controversial way. And it is very well written in an engaging and entertaining way. More potentially pretentious blather here .
Every time I'm moved to think of the excesses of literary fiction, I come back to this; a great book. Intelligent and entertaining.