I love the Millionaire Next Door. It’s almost more behavioral psychology than investing/financial planning. It’s an excellent read. It talks about behavioral simularities between your “average” millionaire. I plan to recommend it to the couples that I see who come in with marital issues related to money and spending. Unfortunately therapists are trained that these issues are related to the communication issues within a couple (which is part true), but the dynamics outlined in this book open another door as to why some people spend and others build their personal wealth. I wish I had learned these lessons before the age of 35!