Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Pinakeswas a bibliographic work composed by Callimachus that is popularly considered to be the first library catalog; its contents were based upon the holdings of the Library of Alexandria during Callimachus' tenure there during the third century BCE. The Library of Alexandria had been founded by Ptolemy I Soter about 306 BCE. The first recorded librarian was Zenodotus of Ephesus. During Zenodotus' tenure, Callimachus, who was never the head librarian, compiled the Pinakes, thus becoming the first bibliographer and the scholar who organized the library by authors and subjects about 245 BCE.