If there is only one book you're going to get this weekend or month, then this is THE book to get. It sells for 1/3 the price if it's an ebook version and it is one for keeps.
Currency Wars is a 2012 book of the year as far as I'm concerned. It is also one that details and explains in layman terms the effects of currencies and exchange rates on everyone's life and investments. This is a book that is imperative for all working in the finance industry. I thoroughly enjoy this book and managed to finish it in a span of a mere 3 days which is quite a feat for a non-fiction as far as I'm concerned!
For those who buys from Kobo, beware that is is a lot more expensive than it is currently on iBook. However, Kobo is having a 30% off this weekend so that should be about the same after the discount.