Good, broad introduction for the "ecotourist".
These people know what they are talking about. They live there and have written useful articles on the wild spain web site and in print already. The book is organised by region (and for once a book that actually mentions Murcia, shock, horror!). You'll find out about animals, birds, plants, geology, the lot.
Lots of colour pictures (photos, maps, etc.) - really a great investment if you have any kind of interest in the country. If all you are interested in is finding the best price for a pint of San Miguel to go with your full English breakfast on the costa, then this isn't the book for you. For the rest of us, pack this book, lots of water and pull your boots on.