The Pirc in Black and White: Detailed Coverage of an Enterprising Chess Opening (Everyman Chess)
THE PIRC IN BLACK and WHITE is, without any doubt, the best book on the Pirc ever written. It's up to date, filled with original analysis by the author, offers interesting move orders that avoid some problem lines, and gives a very useful summary at the end of every chapter.  I said it earlier and I'll say it again: this is a MUST BUY if you play the Pirc, or if you open with 1.e4. An outstanding piece of work!  Jeremy Silman