[b][u]1984 by George Orwell[/u][/b] Liking this book is a thought-crime so forget I said anything. [u][b]Out of the Silent Planet by C. S. Lewis[/b][/u] Lewis might not be your cup of tea judging by your current selection, but this is one of his more secular novels. It's a retro sci-fi tale that is surprisingly philosophical. Lewis does a great job exploring the nature of man. [b][u]World War Z by Max Brooks[/u][/b] Not "deep," but a fun read and probably the most plausible interpretation of a worldwide zombie apocalypse I've ever seen. It also explores the idea of how humans handle crisis.