Storia delle modifiche complessive delle serieUtente: philangies

Real science stories. Exciting, easy-to-read books for children of 8 to 12. Basic science information expertly woven into thrilling stories. Checked by authorities for accuracy. Experiments that children can do themselves. Answer children's "why" and "how" questions in an entertaining way. A new approach in presenting elementary science that will be welcomed by teachers, librarians and the children themselves.

Challenge Books form a new series of human geography books, written with the accuracy of first-hand reporting and the suspense of high adventure. The purpose of this series is to explain the "whys" of geography: for example, Why Eskimos eat meat and fat, why the Japanese carve terraces out of mountainsides for their crops, why the farmers of India continue to rely on man and animal power. Challenge Books cover an extensive range of geographical regions, including Artie Canada, coastal Holland, a French river valley, and North India. The challenge that binds each region together-whether it comes from the sea, from the weather, or from the land itself-is the challenge of the environment.