Evolution

Initiative in Evolution

For Red Hot Blot to Blue Singing Whale

Nature Strange and Beautiful

American Snakes

Fires of Life

Disentangling humans

Humanology

The Butterfly Hunter

Science & Cosmic Messengers

The Social Behavior of Older Animals

The Genesis of Nature and the Nature of Genesis

Creatures Born of Mud and Slime

Pragmatism's Evolution

Cambrian Ocean World

Gaining the High Ground over Evolutionism – Workbook

The Mechanism of Life

The Last Link: Our Present Knowledge of the Descent of Man

The Evolutionist at Large

Degeneration: A Chapter in Darwinism

The Temple of Nature; or, the Origin of Society