So, having mentioned that Freakonomics was one of the books that I'd read, but 'before records began', and having it as one of the '100 books' poster seemed like an excellent excuse to get it off the shelf and read it again. It's one of those books that once started can't be put down, and combined with one or two breaks from my desk in the sunny garden, I found that it came and went in a day. Great stuff, and still brilliant reading about the reasons for the US crime reduction in the 1990s that no-one realised until they came along.