Captain Jack Aubrey, a brilliant and experienced officer, has been struck off the list of post-captains for a crime he did not commit. His old friend Stephen Maturin, usually cast as a ship's surgeon to mask his discreet activities on behalf of British intelligence, has bought for Aubrey his former ship the Surprise to command as a privateer, more politely termed a letter of marque. Together they sail on a desperate mission against the French, which, if successful, may redeem Aubrey from the private hell of his disgrace.

AD, 98. The bustling army base at Vindolanda lies on the northern frontier of Britannia and the entire Roman world. In just over 20 years' time, the Emperor Hadrian will build his famous wall. But for now, defences are weak as tribes rebel against Rome. It falls to Flavius Ferox, Briton and Roman centurion, to keep the peace. But it will take more than just a soldier's courage to survive life in Roman Britain.

On a small estate just outside Rome in the first century BC, two boys become blood brothers, little imagining the extraordinary future that lies before them. As friends and rivals, Gaius and Marcus are destined to find lasting fame.

The story picks up from the end of Blue at the Mizzen when Jack Aubrey receives the news, in Chile, of his elevation to flag rank: Rear Admiral of the Blue Squadron, with orders to sail to the South Africa station. This new novel, unfinished and untitled at the time of O’Brian’s death, would have been a chronicle of that mission, and much else besides. As the novel opens, we are able to visit these friends we have followed so very far in a rare state of almost perfect felicity.

What was daily life in Nelson's navy really like, for everyone from the captain down to the rawest recruit? What did they eat? What songs did they sing? What was the schedule of watches? How were the officers and crew paid, and what was the division of prize-money? These questions and many more are answered in Patrick O'Brian's elegant narrative, which includes wonderful anecdotal material on the battles and commanders that established Britain's naval supremacy.

In the year 1805, the young and enthusiastic Horatio Hornblower is given his first command as Captain of HMS Atropos. A 22-gun sloop, it is hardly the biggest ship in the navy, but undeterred, Hornblower boards the Atropos in eager anticipation of the voyages to come. Acting as flagship during the funeral procession for Lord Nelson, Horatio's first endeavour is to pay tribute to the country's fallen hero.

1793 and Europe is ablaze with war. Thomas Paine Kydd, a young wig-maker from Guildford, is seized by the press gang to be a part of the crew of the 98-gun line-of-battle ship Duke William. The ship sails immediately and Kydd has to learn the harsh realities of shipboard life fast. Despite all that he goes through in danger of tempest and battle he comes to admire the skills and courage of the seamen - taking up the challenge himself to become a true sailor.

HMS Wagtail is a river gunboat, a ship seemingly at the end of her unusual life, lying in a Hong Kong dockyard awaiting her last summons to the breakers' yard. Commander Justin Rolfe is also seemingly at the end of his useful naval life, an embittered man, brooding and angry from a court-martial verdict. Then the offshore island of Santu is threatened with invasion from the Chinese mainland.

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.

England, 1346. For Thomas Blackstone the choice is easy - dance on the end of a rope for a murder he did not commit, or join the king's invasion. As he fights his way across northern France, Blackstone learns the brutal lessons of war. Vastly outnumbered, Edward III's army will finally confront the armoured might of the French nobility on the field of Crécy. It is a battle that will change the history of warfare.

The dramatic sequel to Badge of Glory, China 1900. When the Boxer Rebellion erupts into bloody war. The Royal Marines, true to their motto, are the first to land - and the last to leave. Again, a Blackwood is in command.

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.

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.

The Berlin Wall is down, the Cold War is over, but the world's second-oldest profession is very much alive. Smiley accepts an invitation to dine with the eager young men and women of the Circus' latest intake; and over coffee and brandy, by flickering firelight, he beguilingly offers them his personal thoughts on espionage past, present, and future. In doing so, he prompts one of his former Circus colleagues into a searching examination of his own eventful secret life.

Richard Sharpe avoids the tyrannical Sergeant Obadiah Hakeswill and endeavours to rescue a British officer from under the nose of the Tippoo of Mysore. But in fleeing Hakeswill, Sharpe enters the exotic and dangerous world of the Tippoo. An adventure that will require all of his wits just to stay alive, let alone save the British army from catastrophe.