65 books • 6 series
Come to the Ocean's Edge
Whales! (Strange & Wonderful)
Bear Hug
Dolphin Man
Crows! (Strange & Wonderful)
Dog of Discovery
Sharks! (Strange & Wonderful)
The Environmental Movement
Bats! (Strange & Wonderful)
One Room School
Everybody Has a Bellybutton
Octopus Hug
Taking Care of the Earth
Dinosaurs!
Scorpion Man
Jackal Woman
Chemical and Biological Warfare (Issues in Focus S.)
The Golden Book of Volcanoes, Earthquakes, and Powerful Storms
Batman
The Golden Book of Insects and Spiders
Saving Our Wild Life
Simon Builds a Road
Global Warming
Nuclear Energy