Dr Tom Angier 
Ethics: The Key Thinkers [PDF ebook] 

Ethics: The Key Thinkers surveys the history of Western moral philosophy, guiding students through the work and ideas of the field”s most important figures, from Plato to Mac Intyre. With entries written by leading contemporary scholars, the book covers the following thinkers:
Plato Aristotle The Stoics Thomas Aquinas David Hume Immanuel Kant G.W.F. Hegel Karl Marx J.S. Mill Friedrich Nietzsche Alasdair Mac Intyre
The book explores the contribution of each thinker in turn, narrating how they have changed the shape of ethical theory as a whole. The book also includes guides to the latest reading on each thinker.