• To write a world history of intelligence, from the dawn of recorded history to the present day, is a daunting task. To make such a work accurate, comprehensive, digestible and startling, and all in a single volume, is a stellar achievement. But that is what Christopher Andrew has done in The Secret World.

    Edward Lucas, The Times
  • Brilliant in its sweep and near-miraculous in the detail and confident judgements provided on two and a half millennia of spying ... The book is a crowning triumph of one of the most adventurous scholars of the security world

    John Lloyd, Financial Times
  • Christopher Andrew delivers a stunning secret archaeology of a subject that he himself helped to create

    Richard J. Aldrich, Times Literary Supplement