Freud: A Life for Our Time | 
Freud is a great author who described some of the most disconcerting parts of our existence in a smart and thoughtful ways. Like Kant was said by Schopenhauer to bring about a change in the mind, so Freud brings about a change in our understanding of various deep psychological matters, notably dreams, civilization and religion. Gay's book is well-written too, I believe, approaching Freud in a interesting and meaningful way that makes the man live.
