SOME WORKS
- The Problem of Slavery in Christian America
- The Lost Indictment of Robert E. Lee: The Forgotten Case Against an American Icon
- The Conquest of Kansas by Missouri and Her Allies: A History of the Troubles in Kansas, From the Passage of the Organic Act Until the Close of July, 1856
- The Mark of Zorro (Zorro, #1)
- El Principito
- Buried Alive: The Startling, Untold Story about Neanderthal Man
- There Is a God: How the World's Most Notorious Atheist Changed His Mind
- The Mechanical Theory Of Heat (1879)
- The Genetical Theory of Natural Selection: A Complete Variorum Edition
- Atmospheric Thermodynamics