This is probably one of the lesser known of the books about Greenspan. However, I picked it up after randomly coming across it and found it to be intelligent and insightful, with more insight into his personality than his monetary policy, which is fine with me because there are a million places to learn more than you'd ever want to know about that.
Most people think of Alan Greenspan as the prototypical conservative banker, with his "dour" appearance and somber, wordy pronouncements. However, if you read this book, you will find that in some respects nothing could be further than the truth. An eccentric and a bohemian, Alan Greenspan was a Greenwich Village jazz saxophonist and an amateur philosopher until his mid twenties when Greenspan developed his true focus on economics. The book even alludes to the notion that he had been exposed to marijuana and the counterculture of that New York scene a full generation before the 1960's.
All in all, this book does a lot for Greenspan's image as a chronically unhip person. Similarly, it does a good job of establishing that Greenspan's beliefs and actions are grounded in genuine moral disdain for economic leftism and its disasterous implications.
So, if you can pick up a copy I really recommend this lesser known book. There is a lot of outlandish idolization of Greenspan as "the oracle" or some similar silliness. He is no oracle, just a very fine economist who seems to have a pretty interesting life story as well.