What pushed Blunt, Burgess, Cairncross, Maclean and Philby into Soviet hands? With access to recently released papers and other neglected documents, this sharp analysis of the intelligence world examines how and why these men and others betrayed their country and what this cost Britain and its allies.

‘Richard Davenport-Hines, in his fascinating and compendious new book … challenges prevailing interpretations and provides answers to all the major questions about spies… As a result, this book manages to be both nostalgic and politically progressive when it seeks to remind us, passionately and eloquently, of the value of trust’ Guardian ‘Davenport-Hines writes persuasively … Enemies Within provides a comprehensive demolition of many widely accepted myths surrounding communist subterfuge during the Cold War … it is encouraging to come across such an erudite and unapologetically ‘elitist’ counterblast’ Spectator ‘A supremely accomplished historian … he writes with mordant wit and a merciless eye for distortions … the great virtues of this book lie in the detail Davenport-Hines amasses and his sense of context’ Sunday Times ‘He is strong on retelling the spy stories … but the chief virtue of the book is the almost revisionist judgments he feels able to make based on his research … in this rich, detailed and entertainingly irascible book’ Book of the Week, The Times ‘The product of one of our greatest modern masters of non-fiction Richard Davenport-Hines, Enemies Within is an exhaustive … chronicle of spies in Britain … a mosaic of such vivid detail’ Craig Brown, Mail on Sunday ‘There could not be a more experienced interrogator of a subject so festooned with myths of sleaze, power and treachery … Enemies Within is a peculiar and fascinating hybrid’ Observer ‘Richard Davenport-Hines dissects and destroys … conventional wisdom in his masterly retelling of Britain’s most notorious intelligence disaster … makes his case with splenetic zeal, backed by a formidable array of sources … fascinating’ Economist ‘The history of the five Cambridge spies recounted in this book with Richard Davenport-Hines’s usual vim and brio … a vivid panorama … [he] bases his case on wide research and illustrates it with a wealth of piquant anecdote’ Literary Review

• Will appeal to readers of Ben Macintyre, Christopher Andrew and Miranda Carter. • Richard’s acclaimed work – across social, economic, political and literary history – makes him a rarely qualified writer on the multi-faceted Keynes. His ‘An English Affair’ won the Political Book Awards History Book of the Year.