Persica (/pεrsɪkɑː/; Ancient Greek: Περσικά, Persiká) is a lost Ancient Greek text, divided in 23 books, on Assyrian, Median and Persian history written by Ctesias of Cnidus, a physician at the court of the Persian king Artaxerxes II (404–358 BC). The work's style and value for the study of the Achaemenid history have been a subject of much controversy among modern scholars.