Although the shelves of bookshops groan with diet books, this one is called, mysteriously, 'The Only Diet'. The excuse that Nathaniel Blix gives for claiming this name is that, really, there is only one diet. While other diet books dress up this basic regime in huge variety of ways, what they all aim for-or should aim for-is the same thing, and that's a healthy diet that's right for you. This entertaining little book strips such fancy programmes down to their bare essentials to reveal the basic diet beneath. Blix has removed all the prescriptive stuff about what you should eat for lunch and...