Lackey, Mercedes, Eric Flint, and Dave Freer. The Heirs of Alexandria
Divergence: 415 CE
What if: Hypatia of Alexandria triumphed in her debate/conflict with Cyril and her philosophy was blended into Christianity.
Series note: Series including The Shadow of the Lion, A Mankind Witch (by Freer only), This Rough Magic, Much Fall of Blood and the to-be-published The Great Doom's Image.

Lackey, Mercedes, Eric Flint, and Dave Freer. The Shadow of the Lion
Divergence: 415 CE
Summary: Murder, magic and intrigue in a 16th-century Venice, where the demon-possessed grand duke of Lithuania seeks to distract the attentions of the Holy Roman Empire.
Series note: First volume of The Heirs of Alexandria.
Published: Baen 2002 (0743435230BUY), 2003 (0743471474BUY).

Freer, Dave. A Mankind Witch
Divergence: 415 CE
Series note: Second volume of The Heirs of Alexandria.
Comments: Third published book in the series. It was not part of the originally planned tetralogy but was subsequently written as an intersticial work.
Published: Baen 2005 (0743499131BUY), 2007 (1416521151BUY).

Lackey, Mercedes, Eric Flint, and Dave Freer. This Rough Magic
Divergence: 415 CE
Summary: The Lithuanian attack against the H.R.E. again focuses on subverting Venice, but this time through a Hungarian attempt to capture Corfu and thereby close the Adriatic.
Series note: Third volume of The Heirs of Alexandria.
Published: Baen 2003 (0743471490BUY), 2005 (0743499093BUY).

Lackey, Mercedes, Eric Flint, and Dave Freer. Much Fall of Blood
Divergence: 415 CE
Series note: A volume of The Heirs of Alexandria.
Published: Baen 2010 (1439133514BUY).

Lackey, Mercedes, Eric Flint, and Dave Freer. The Great Doom's Image
Divergence: 415 CE
Series note: A volume of The Heirs of Alexandria.
Published: Not yet published; publication date unknown.