Not particularly tech related but these books made me change my attitude towards life: - mans search for meaning by victor frankl, book about holocaust written by a psychiatrist. Quite well known, I guess I do not need to say too much. - A Long Way Gone, written by an ex child soldier, quite fascinating to me what these people had to endure. - "SOS" Emotions-Lexikon (apparently only in german) I got this for christmas and its quite a cool book to help deal with your emotions.