• "Fascinating biography ... Hemming has done a superb job"

    Ben Macintyre, The Times, 'Book of the Week'
  • "Excellent biography… The author has done a terrific job of unscrambling Knight’s muddled life"

    The Sunday Times
  • "Jaw-droppingly revelatory biography. *****"

    Mail on Sunday
  • "‘Compelling new biography… Hemming has done a wonderful espionage job of his own, scouring obscure files to bring long-hidden agents and their exploits to light. It is also a gripping portrait of an era, now long gone, when the establishment could accommodate such extravagant oddness."

    Daily Telegraph
  • "Henry Hemming has found a peach of a subject... Full of new material, fresh interpretations and uncompromising integrity... He has managed the great feat of producing a rattling good read that is also a major piece of revisionist history"

    Richard Davenport-Hines, Wall Street Journal
  • "Hemming has written a very readable, thoughtful and comprehensive account"

    Alan Judd, Literary Review
  • "I raced through Henry Hemming's book, constantly having to remind myself that it wasn't a work of fiction. It really has everything you'd want from a great espionage story: incredible agents risking their lives; the highest possible stakes, with the safety of the world hanging in the balance; and at its heart a complicated, mercurial spy master in Maxwell Knight spinning an ever more intricate web."

    Matt Charman, Oscar-nominated screenwriter of 'Bridge of Spies'
  • "A major new biography"

    Mail on Sunday
  • "Engaging and suspenseful"

    Financial Times
  • "Lively contribution to a maverick literature"

    The Observer