Anabasis Alexandri

Anabasis Alexandri was a book written by, obtained by Ezio Auditore da Firenze in the 16th century from one of Constantinople's many book shops.

Summary
One of the only complete accounts of the military campaigns of Alexander the Great, "The Campaigns of Alexander" is actually a compilation made up of earlier sources, all of them now lost to the dustbin of history.

Reference

 * Assassin's Creed: Revelations