Trigger

Deep beneath the placid Mediterranean, the submarine Trigger stalks the enemy convoys...

Lieutenant Peter Harding is one of the most successful commanders in the Fleet. But no man's nerve can last forever - and Harding's is beginning to crack. But the Admiralty has its own ways of securing Harding's continued service. And it has one further task for Trigger and her crew.

An allied agent and a brilliant scientist who is vital to the success of the top secret Manhattan Project is on the run in ...