The fifth book of Diogenes Laertius’ Lives of the Philosophers is concerned with the first four heads of the Peripatos – Aristotle, Theophrastus, Strato, and Lyco – and two outstanding members of the school – Demetrius of Phalerum and Heraclides of Pontus. Consideration is given her to rather general matters of structure, organization, and arrangement of material in Book Five as a whole, to the different categories of information in the individual lives, and to the most striking feature of this book which set it apart from other books: namely, the wills of the first four scholarchs and the extensive catalogues of writings which Diogenes has included for five of the six philosophers.
Sollenberger, Michael, "The Lives of the Peripatetics: Diogenes Laertius, Vitae Philosophorum, Book Five" (1986). The Society for Ancient Greek Philosophy Newsletter. 129.