I'm working my way through Terry Pratchett's Discworld series... again! But I also just read something called The Number: A Completely Different Way to Think about the Rest of Your Life, which has really fascinating information about what different people to do plan for retirement, and about how most of us don't start thinking about it until we are like 50 and then we are totally screwed, and about how long people will be living in the near future (hint: 150 or older) and things that people choose to do in their retirement and how they finance it... I'm glad I'm reading it at age 29 instead of 49, for sure!