具体描述
A world of knowledge at your child s fingertips! Absolutely bursting with thousands of fascinating facts， Backpack Books are small enough to carry with ease， but big enough to provide all the answers. Researched and written by experts， topics are covered in encyclopedic and easy-to-understand detail. Hundreds of colorful illustrations and photographs bring knowledge to life， and are arranged clearly and logically to make finding out quick and easy for readers of all ages.
