  None of Antiochus’ books have survived, but we know something about them. He wrote an epistemological work called Canonica in at least two books. The title comes from ‘kanôn,’ meaning a ruler or straightedge, a term that was used by philosophers in the Hellenistic period for the standard or criterion of truth. It is cited by Sextus Empiricus in his survey of views about the criterion of truth at Against the professors, i.e., Adversus Mathematicos [M] 7.162, 202, and modern scholars have conjectured that it was Sextus’ source for much of that survey (cf. Tarrant, 1985, 94–6; Sedley, 1992). The Sosus, possibly a dialogue, was also an epistemological work and belonged to the last phase of Antiochus’ controversy with Philo (Cicero, Acad. 2.12). He wrote a book about the gods, concerning which we know nothing more.  He sent a book to the Roman Stoic, Balbus, in which he maintained that, despite differences in terminology, the Stoics and Peripatetics (as Aristotle’s successors in his school, the Peripatos, were called) were largely in agreement on matters of substance (Cicero, N.D. 1.16). And Cicero informs us that he wrote in many places about his view of the relation between happiness and virtue (T.D. 5.22).