  As one would expect given his prominent role in the translation movement, al-Kindi’s works are suffused with ideas from Greek thought. His philosophical works are indebted in part to the mathematical and scientific authors translated by his day, for instance Nicomachus of Gerasa; Euclid influenced his methodology as well as his mathematics (cf. Gutas 2004). But the most important influence on his philosophy was from Aristotle, whose corpus al-Kindi surveys in a treatise called On the Quantity of Aristotle’s Books (Abu Rida 1950, 363–84; also Guidi and Walzer 1940, Cortabarria Beitia 1972, Jolivet 2004, Ighbariah 2012). This work provides a fairly thorough overview of Aristotle’s corpus, though al-Kindi clearly has not read some of the treatises he discusses. When al-Kindi comes to mention the contents of the Metaphysics he gives the following, rather surprising, summary: