Rich Dad, Poor Dad - Robert T. Kiyosaki with Sharon L. Lechter, C.P.A. (excellent book on attitude changes that promote wealth)
Don't Get Taken Every Time - Remar Sutton (buying cars wisely)

The Relaxation Response - Herbert Benson, M.D. (simple but good; a nice approach to reducing stress)

The Cartoonist's Workbook - Robin Hall (very highly recommended as a first book on cartooning for people like me, who can't even draw good stick figures at first; also very informative about how to get gag ideas, get started in the cartooning biz, etc.)
The Big Book of Cartooning - Bruce Blitz (fun and thorough)
Cartooning The Head and Figure - Jack Hamm (older book, gives a LOT of very specific examples for different aspects of cartoon character drawing; a good addition to your cartooning library)