I picked this up today, after enjoying the first book, Freakonomics, a few years ago. Only a few pages in and hooked already.
Amazon: £5.88 http://www.amazon.co.uk/Superfreakonomics-Cooling-Patriotic-Prostitutes-Insurance/dp/0141030704/ref=sr_1_3?ie=UTF8&s=books&qid=1277055539&sr=8-3-spell
WH Smiths - £4.99 in store, or plus delivery from their site (not sure how much total, please post in comments so I can amend this post).
Steven Levitt, the original rogue economist, and Stephen Dubner have spent four years uncovering the hidden side of even more controversial subjects, from terrorism to shark attacks, cable TV to hurricanes. The result is "Superfreakonomics". It reveals, among other things: why you are more likely to be killed walking drunk than driving drunk; how a prostitute is more likely to sleep with a policeman than be arrested by one; why terrorists might be easier to track down than you would imagine; and, how a sex change could boost your salary. Because sometimes the most superfreaky solution is the simplest.