From the publisher:Continuing the Classic Play series, the Book of Dragons is the definitive work on fantasys most popular creatures. Building upon and extending the Slayers Guide to Dragons, this book is designed to complement the former Slayers Guide and add a great deal more information for the Games Master. A wide variety of new dragons are introduced, along with complete lairs, studies of the effect dragons have on their environment, how they guard their hoards and the minions they employ and enslave to further their own goals. - BoardGameGeek