This is not an official vote, because I am unable to get these books, but....I hope the group chooses either Collapse, or Why People Believe Weird Things. I have read rather a lot on theories of why civilizations collapse and I live in the middle of ruins of two great ones, the Aztecs and the Maya. And I am frankly just interested in goofy stuff and the psychology behind it like alien abduction. Although I must say that when I was abducted the last time.....Marti in Mexico