This is a 158-page Gakken manga that teaches about dinosaurs in detail. It's a great item for children to enjoy while learning. - Title: The Secrets of Dinosaurs - Series: Secrets Series - Number of pages: 158 pages - Illustrations: Dinosaur illustrations - Supervision: [omitted] - Publisher: Japan PTA National Council - There is some discoloration, and the cover has some tears. There is also some writing on part of the cover, but it is in relatively good condition. Thank you for viewing.