Dr James Vigus is a FIDE Master and a former British Junior Champion. His first book for Everyman Chess, The Pirc in Black and White, was hailed by reviewers as an outstanding work.
For serious Pirc players this book will constitute an excellent update on the theoretical status of the most topical lines.- ChessCafe.com The days when the Pirc was a second rate response to 1.e4 are over. While it may never replace 1...e5 or certain variations of the Sicilian as Black's most trusted answer to 1.e4, there can be no doubt the Pirc has entered the main stream and that the books by Vigus are the one's to get if you want to play this defense.- Chess Today