It is not generally agreed whether Plato was the author of any of these books. I. Hippias Major (or Greater Hippias) II. Second Alcibiades (or On Praying) III. Theages IV. The Rivals (or Rival Lovers) V. Hipparchus VII. Clitopho (or Clitophon) VIII. The Epistles (13 Letters) IX. Epinomis (or The Philosopher) X. Axiochus (or On Death) XI. On Virtue XII. On Justice XIII. Sisyphus (or Upon Taking Counsel) XIV. Demodocus XV. Definitions XVI. Timaeus Locrus (or The Treatise of Timaeus the Locrian, On the Soul of the World and Nature)- Summary by Geoffrey Edwards