5 books in series

The Hinges of History

The Hinges of History is a 5-book series with 5 primary works first released in 1995 with contributions by Thomas Cahill.

How the Irish Saved Civilization
The Gifts of the Jews
Desire of the Everlasting Hills: The World Before and After Jesus
Sailing the Wine-Dark Sea: Why the Greeks Matter
Mysteries of the Middle Ages