Gardening for the Future of the Earth

The Call of Earth (Homecoming Saga, Vol 2)

Man Who Fell to Earth

Earth Logic : Elemental Logic: Book 2 (Elemental Logic)

Valley of the Horses (Auel, Jean M. , Earth's Children.)

Illearth War Covenant 2

The Shelters of Stone (Earth's Children, Book 5)

The Mammoth Hunters (Auel, Jean M. , Earth's Children.)

Mammoth Hunters (Earth's Children)

If You Lived at the Time of the Great San Francisco Earthquake