Costello J. Mask of Treachery / John Costello. — First Edition. — New York : William Morrow and Company, Inc., 1988. — 765 p.
"A first-class book. This new biography of Anthony Blunt is brilliantly researched, giving fresh insight into this complex and giften Soviet spy. Author John Costello shows a grasp of the subject which is incomparably the finest yea revealed. I would put this book at the top of any serious best-seller list." -- Andrew Boyle, author of the best-selling The Fourth Man, the first book to identify Anthony Blunt as a Soviet agent
"John Costello's research has uncovered the most detailed and intimate picture of Anthony Blunt and the tangled lives of the Cambridge spies yet published. This is an important and valuable book." -- William Hood Author of Moles and Spy Wednesday