Jonah Goldberg's Liberal Fascism is clearly an important book which challenges a number of leftist nostrums; my friend Dominic Hilton has written a very good, full review of it over at the New Culture Forum.
Insofar as it addresses the use of political terminology and language, and the way in which we have allowed the left to define the terms we use, a previous Con Home piece of mine on the topic is here.
