Preface - Cover-Up: ‘When the Righteous Sin’PART ONE Incognito: Klaus Fuchs and Niels Bohr1, ZigzagPART TWO The Overestimate of the Germans2. The Taste of Fear: The Menace of Fission3. The Beginnings of a ‘Strategic Game’4. Struggles over Secrecy5. The Midwives6. The Strategic Sabotage of Heavy Water7. The First Glimpses of Germany's Nuclear Secrets8. The ‘Crown Jewel’ of Secrets9. Intelligence Blackout: The Fatal Mistake10. Fall Out11. ‘Hard Evidence’ of Soviet Spying12. The Secret Agenda of General Groves13. The Bohr Scare14. A Vital Clue Vanishes15. ‘Don’t Bother Me With Your Scruples’: The Loss of Innocence16. ‘The Claws of the BearPART THREE Lives in Parallel: Niels Bohr and Klaus Fuchs17. The Little Fox18. Lunch in the Supreme Court19. ‘The Mission He Had Been Waiting For’20. A President ‘Eager for Help’21. The Letter from Moscow22. The Prime Minister’s Mistake23. The Bomb in Trouble: Mistakes at Los Alamos24. The President’s MistakePART FOUR The Underestimate of the Russians25. Bohr and Stalin26. Fuchs: Shining in the ShadowsList of tllustrationsAcknowledgementsNotesIndex