A goof overview of market mechanics
This is a book that deals mainly with the history and mechanics of the currency markets, the relationship between the pairs and other instruments, differences in the forex sessions through the 24hr day, types and validity of analysis with a few strategies thrown in.
Very logically written, quite detailed, a bit dry - but it's forex, not Pooh Bear. If you like to know a bit about what's under the bonnet of forex this is for you. As Joe DiNapoli points out (as well as others) - you wouldn't dream of being in any other business without having a thorough knowledge of all aspects of the business, so why would you treat trading differently?