Britain has gone blind in the Atlantic. Unless Ned Yorke can steal Germany’s greatest secret, the war at sea may be lost.

The Royal Navy has been secretly reading German U-boat signals, allowing convoys to slip past the wolfpacks hunting them. But now the Germans are preparing to introduce a new Mark III Enigma machine and the formidable Triton cipher, a combination that could plunge the Atlantic into an intelligence blackout and leave Britain’s vital shipping at the mercy of Dönitz’s submarines.

Ned Yorke is handed an almost impossible assignment: capture the new Enigma machine and its cipher manual without the Germans ever discovering they have been taken. If Berlin learns the secret is compromised, the codes will simply be changed and the mission will have been for nothing.

So Ned devises an audacious trap.

Disguised as helpless survivors adrift in a lifeboat, he and a hand-picked team must lure a German U-boat close enough to seize it, and then somehow bring its priceless secrets safely home through an Atlantic where friend and foe alike will try to sink them.

Decoy is a gripping Second World War naval thriller packed with submarine warfare, espionage, deception and high-stakes action from the acclaimed author of the Ramage series.