Malta 1941. To most people H.M.S. Saracen is just an ugly, obsolete ship with an equally ugly recent history: her last commander is due for court-martial after shelling the troops he was sent to protect. But to Captain Richard Chesnaye she brings back memories - memories of the First World War when he and the old monitor went through the Gallipoli campaign together. It seems that captain and ship are both past their best. But as the war enters a new phase Chesnaye senses the possibility of a fresh, significant role - for him and the Saracen.

In 1941, when she was turned into an armed merchant cruiser, the SS Benbecula was already old. Yet even she was needed to protect the vital Atlantic sea lanes. Commander Lindsay, her new captain, had to work desperately to mould the ship’s company - raw recruits and old-timers - into a fighting force. And better than anyone, Lindsay knew this could be his last command, his last chance.

HMS Temeraire: latest and most advanced of Britain's nuclear submarines. When Temraire's trials are cut short and she is ordered to the Far East to reinforce the fleet against a threat from Red China, her captain, David Jermain, knows that this is no routine exercise in flag-waving. And once in Asian waters, he and his submarine find themselves involved in a hidden, undeclared conflict beneath the sea.

They were the men and women of the Royal Navy's Special Operations units. Carrying out lightning raids on hostile coasts, they became a navy within a navy - each handpicked for their individual skills, and all of them courageous. Against the mighty backdrop of World War II they performed their small but deadly operations - living often beyond hope, sometimes beyond mercy. This is the dramatic story of a handful of such people. The Volunteers.

Twenty-five years ago HMS Terrapin was part of a crack hunter/killer group in the Battle of the Atlantic. Now she is working out her last commission in the Gulf of Thailand. To Lieutenant-Commander Standish, the frigate seems to mark the end of his hopes of a career in the navy. Then a new captain arrives, a man driven by an old-fashioned, almost obsessive patriotism. And under his stubborn leadership, Standish and the crew discover a long-forgotten unity of purpose.

In November 1941, Lt Ralph Trewin, DSC arrives at Singapore as second-in-command of HMS Porcupine. To the shell-shocked Trewin, the gun boat and her five elderly consorts symbolise the ignorance and blind optimism he finds in Singapore.

The Mediterranean, 1943... The HMS Rob Roy. A tiny machine, just 230 feet from stem to stern. In peacetime she would have trawled for cod. Now her catch is deadlier by far. Lieutenant-Commander Ian Ransome is a veteran of the treacherous front line of naval combat. Under sealed orders in the battle-tossed waters of the Mediterranean, he and his jack-tired crew face one final test of their courage....

The old submarine-chaser USS Hibiscus, re-fitting in a Hong Kong dockyard before being handed over to the Nationalist Chinese, is suddenly ordered to the desolate island group of Payenhau. For Captain Mark Gunnar - driven by the memory of his torture at the hands of the Viet Cong guerrillas - the new command is a chance to even the score against a ruthless, unrelenting enemy. But Payenhau is very different from his expectations....

As the Second World War progresses, the destruction of Allied shipping mounts. Fighter pilot Tim Rowan is posted to an escort carrier to help guard the precious convoys. His adventures take him first to the Arctic and then the Indian Ocean.

The crack German cruiser Prinz Luitpold had always been lucky in battle. To the beleaguered army on the Baltic coast she was their one remaining symbol of hope. But it is the summer of 1944, and on every front the war is going badly for Germany. When the order comes to leave the Baltic to attack and destroy enemy shipping in the Atlantic, Kapitan zur See Dieter Hechler knows that once out in this vast killing ground it will only be a matter of time before the hunter becomes the hunted.

January, 1944. When the British light cruiser Andromeda arrives at Williamstown naval dockyard to be handed over to the Royal Australian Navy, she is already a legend - having earned her young captain, Richard Blake, the Victoria Cross in her last victory against overwhelming odds in the Mediterranean. Blake has grown to love Andromeda, so has few regrets when he is unexpectedly told to retain his command with a British and Australian ship’s company.

When Captain Guy Sherbrooke joins HMS Reliant in 1943, he knows he may be her last Captain. Sister battleships have been destroyed, and Sherbrooke cannot alter the bitter truth that there will be no half measures for HMS Reliant.

HMS Royston, Coastal Forces Depot Ship, is mother ship to a battered, war-worn bunch of MTBs and MGBs. New on board is Sub-Lieutenant Royce: commissioned for three months, sea experience three months in an Asdic trawler, and aged 20. His commanding officer is Lieutenant Harston, aged 23.

His predecessor has been killed in action 48 hours earlier and is now hardly remembered. The crew are all young - some very young - but all old before their time....

The human torpedo, or chariot, is the ultimate weapon in a war, and only men of extreme courage or recklessness volunteer for the special operations missions requiring its use. Reeman has also written 22 novels under the pseudonym Alexander Kent.

Western Ocean, 1942... From the bridge of HMS Gladiator, Lieutenant-Commander David Howard’s orders were chillingly clear. There could be no mercy. To the men who fought to protect the vital, threatened Merchant Navy convoys in the Western Approaches, the Battle of the Atlantic was a full-scale war. A relentless, savage war against an ever-present enemy and a violent sea - in an arena known only to its embittered survivors as the killing ground. HMS Gladiator was part of that war.