Introduces philosopher, writer, and environmentalist Henry David Thoreau, using selections from his own writings and an imaginary journey into the wilderness.

A collection of poems recall the sights and feelings experienced on a springtime walk--from home, through the woods, and back again.

Defines the equator and indicates how plants, animals, and humans learn to survive in this extreme environment.

"It takes our many body systems working together to keep us alive and living our lives to the fullest. This set of True Books offers an in-depth look at our amazing bodies-one system at a time"-- "Discover the main systems of our amazing human body with this new series of books!The human brain is a natural wonder - the command center that, through a network of nerves, runs every other system in our bodies. Did you know that there are 100,000,000,000...