Amphibians and reptiles once ruled the planet, and their descendants exhibit some of the most colorful variety and astounding behavior known to the animal kingdom. What are the origins of these creatures? In this gorgeously illustrated book, David Attenborough gets up close and personal with the living descendants of the first vertebrates ever to colonize the land, and through them traces the fascinating history of these animals worldwide. Along the way, Attenborough raises awareness of the threats that global warming and other environmental changes pose to many of these creatures.