In Ancient Philosophy (2012), Christopher Shields expanded on the coverage of Socrates, Plato, and Aristotle in his earlier book, Classical Philosophy (2003), to include the philosophy of the Hellenistic era. In this new edition (2023),

Shields reaches even further to include material on Neoplatonism and on Augustine and Proclus, capturing from Thales of Miletus to the end of the sixth century CE all of what might be called ancient philosophy. It traces the important connections between the periods and individuals of more than 1,200 years of philosophy’s history without losing sight of the novelties and dynamics unique to each. The coverage of the Presocratics, Sophists, Plato, and Stoicism has also been expanded so as to highlight Plato’s responses to the Sophistic movement in the development of his Theory of Forms.