There are numerous surviving ancient Greek and Latin sources on Alexander the Great, king of Macedon, as well as some Asian texts. The five main surviving accounts are by Arrian, Plutarch, Diodorus Siculus, Quintus Curtius Rufus, and Justin. In addition to these five main sources, there is the Metz Epitome, an anonymous late Latin work that narrates Alexander's campaigns from Hyrcania to India. Much is also recounted incidentally by other authors, including Strabo, Athenaeus, Polyaenus, Aelian, and others. Strabo, who gives a summary of Callisthenes, is an important source for Alexander's journey to Siwah.