This colouring book is about the horned dinosaurs (ceratopsians) and their close relatives. This colouring book is one in an ongoing series of Prehistoric Times, What Color Were Prehistoric Animals Coloring Books. The first one was about Dinosaurs (volume 1), Sharks (volume 2), Mammals (volume 3), Crocodiles (volume 4), Dinosaurs (volume 5), Pterosaurs (volume 6), and Aquatic Animals (volume 7). Both Mike Fredricks (editor and owner of Prehistoric Times Magazine) and Tracy Ford (a self-taught palaeontologist and dinosaur artist) want to expose the public to new and unusual prehistoric animals. More colouring books are in the works.