This volume presents the first authoritative English translation and scholarly commentary on a little known but important ancient historical source: the second/third century Roman historian Justin"s "epitome" or abridged version of the Philippic History by Pompeius Trogus (27 BC-AD 14). This book covers books 11-12 and represents one of the five major sources for historians on the life and times of Alexander the Great. A second volume, forthcoming, will cover books 13-15.