"Life of Pi" is an excellent book. Recently i finished "Unaccustomed Earth" by JHumpa Lahiri, which explores the psychology of Migrants population living in USA. But if you really want scary as well as serious book and you have good backgtround of Science read "Selfish Genes" by Richard Dawkins. It will compel us to think about our existence and "Cosmos" by Carl Sagan is also a great BOOK for non-fiction reader.