"Andrew Wflliams's debut novel The Interrogator has a flair, grasp of detail, and strong characterisation that reminds me uncannily of Robert Harris's best-seller Enigma, and there's no higher praise... This is a terrific first novel. Harris had better watch out' Daily Mail

"The tensions within the intelligence community simmer excitingly.., his dialogue is energetic, and he is armed with a real passion for these events. Events are never absurd or melodramatic, and the characters are damaged, driven and fallible.., this is gripping stuff. Williams has put his knowledge to work, and any reader will emerge from this debut enter- tained and half-amazed at a terrific, mostly untold story' Independent

IN THE SPRING OUR U-BOAT WAR WILL BEGIN AT SEA, AND THEY WILL NOTICE THAT WE HAVE NOT BEEN SLEEPING...

Spring, 1941. The armies of the Reich are masters of Europe. Britain stands alone while Hitler's submarines prey on the Atlantic convoys that are the country's only lifeline.

As the Blitz reduces Britain's cities to rubble and losses at sea mount, interrogator Lieutenant Douglas Lindsay becomes convinced Germany has broken British naval codes. But he's a lone voice, and his superiors don't trust him. In one last desperate throw of the dice, he sets a trap for his prize captive - the U-boat commander who sent his ship to its doom.

PROLOGUE

PART ONE

March 1941

April 1941

May 1941

June 1941

PART TWO

July 1941

August 1941

September 1941

PART THREE

Historical Note on Codes

Note on Sources