Sharks, puffer fish, polar bears, and the world's deadliest animal — the mosquito. Learn all about deadly animals, both big and small. Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!

Learn about the crazy adventures of Jeff Corwin and how he became one of television's most famous naturalists. Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!

In 1937, pilot Amelia Earhart set out to fly around the world. She never returned. Can this timeless mystery be solved? Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!

It's snot easy to find a reader this entertaining! Learn about mucus in humans and animals, and even in the laws of our countries! Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!

Most of us think babies, kittens, and puppies are adorable, but why? What makes something cute? Use your unique code to access the online reader, complete with videos and interactive exercises. Plus, download a free e-book version of the reader!

A lively, humorous and richly illustrated grammar series for children aged nine to twelve.