description
This work on Alexander is one of the few surviving complete accounts of the Macedonian conqueror's expedition. Arrian was able to use sources which are now lost, such as the contemporary works by Callisthenes (the nephew of Alexander's tutor Aristotle), Onesicritus, Nearchus, and Aristobulus, and the slightly later work of Cleitarchus. Most important of all, Arrian had the biography of Alexander by Ptolemy, one of Alexander's leading generals and possibly his half-brother.