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 Italy. It's up to Harding to take Trigger deep into enemy waters to ensure the agent's safety - no matter what the cost... Will Trigger and her crew see it through to the end before the strain gets too much? Trigger is a thrilling and captivating adventure, perfectly suited for those who enjoy classic nautical tales. Another classic naval adventure for fans of Alan Scholefield and Philip McCutchan.