Authors of the Medieval and Renaissance Eras: 1100 to 1660
The Sun-Centered Universe and Nicolaus Copernicus
America in the Cold War: A Reference Guide
Authors of the Early to mid-20th Century
Authors of The Enlightenment: 1660 to 1800
Warfare in the Roman Republic: From the Etruscan Wars to the Battle of Actium
Charles Darwin and the Theory of Evolution by Natural Selection
Johannes Kepler and the Three Laws of Planetary Motion