What impresses most about this book is not so much the encyclopaedic coverage of all things natural, but the superb presentation which frankly surpasses anything Microsoft can put on a DVD. I thought I had seen most of the world's best natural photography, but there are many superb new shots in this book and the accompanying texts are concise and to the point. A real revelation, particularly if, like me, you grew up with the bone dry text books of the 1970s. If I had to criticise, I would say that it's an imposing book physically, which makes it slightly awkward to sit down and read comfortably for more than half an hour or so. Other than that, well worth the price.