Rich Dad, Poor Dad, by Robert Kiyosaki (1997). Fascinating to basically go back in time a quarter century, before the housing bubble (the first one, not the current one!), and even before the dot-com bubble. I'm only three chapters in, but I'm looking forward to reading his other book, Unfair Advantage, after this one, which came out in 2011 (ostensibly between bubbles). Fascinating perspective, I must say, and one of the few so-called "experts" who understands the difference between an asset and a liability...seriously!