I just finished an excellent book, Radicals for Capitalism by Brian Doherty, about the history of the modern libertarian movement. Very well, researched, very well written. (Before I plunged in, I took the precaution of looking up Robert Anton Wilson in the text, so that I could verify that he was treated respectfully. He was, so I went ahead and read the book.) This is a book you'll want to read with two bookmarks -- one for the text, and the other for the notes in the back, where Doherty puts much of his interesting facts and gossip.