Barney, Rachel, Names and Nature in Plato's Cratylus, New York: Routledge, 2001.
Excerpt:
The Cratylus is Plato’s most extended discussion of language—more precisely, of ‘the correctness of names’—and one of his most enigmatic dialogues. As such, it has attracted a daunting mass of interpretive debate, but there is still no real opinio communis on the principal philosophical purpose of the dialogue or its positive results, if any.
Online:
Google Books
Amazon