Abstract
It is a pleasure to welcome this long awaited set of translations, texts and commentaries. A renewed interest in Hellenistic philosophy has fostered a wealth of important scholarship, but the lack of an adequate sourcebook has seriously hampered scholars' ability to present this material to students and to make these thinkers more widely known in the philosophical community. The research of both Long and Sedley is much respected, and it is fortunate that such thorough scholars were chosen to make this material available. Volume 1 is a collection of translations followed by philosophical notes. Volume 2 contains the texts, apparatus criticus, and supplementary notes of a more technical and philological nature, as well as an extensive bibliography.