Dr Paul Murgatroyd 
Mythical Monsters in Classical Literature [PDF ebook] 

This engaging, readable yet impeccably scholarly investigation of monsters in Classical literature will entertain and stimulate as well as inform. It covers all the major mythical monsters mentioned by Greek and Roman authors (Medusa, Hydra, Polyphemus, the Minotaur, Sphinx, Harpies, Sirens, Cerberus, Chimaera, Centaurs, and many more) along with Classical precursors of vampires, werewolves and the living dead. Versions of these creatures that appear in later literature and film are also discussed.
Mythical Monsters is original in considering monsters squarely from a literary standpoint, introducing elements of literary analysis gradually as the work progresses, and building up to quite a sophisticated approach. This will increase readers” critical appreciation and plain enjoyment of these stories, which continue to fascinate today. To facilitate browsing, each chapter can be read independently. There is a useful bibliography, and the book is enlivened by illustrations from ancient and more recent art.