Jjay wheather its a kid book or an adult-level book, reading is always good for anybody, reading anything can broaden your horizons. It surly broad that guy's horizons because its within his level. Anyways, I've read couple of books that I really enjoyed alot and Bless Me Ultima is one of them which shows you a different precpective of life and way of thinking, I really recommend you reading that book Anthony. Another book that I really enjoyed was The Stranger ( awsome detailing and great story) and I recommend you reading this book too more than the first one lol! The story is about a guy whose family was religious and his mother dies so he acts like nothing happen, he thinks about life in a different way.. more than a philosophy book..
I like mysterious books too but for a certain author, John Grisham is my favourite, even though you dont learn much from his books but I live details and he rocks at that!

Regards