Napoleon, escaped from Elba, pursues his enemies across Europe like a vengeful phoenix. If he can corner the British and Prussians before their Russian and Austrian allies arrive, his genius will lead the French armies to triumph at Waterloo. In the Balkans, preparing a thrust northwards into Central Europe to block the Russians and Austrians, a horde of Muslim mercenaries is gathering.

Napoleon has been defeated at Waterloo, and the ensuing peace brings with it both the desertion of nearly half of Captain Aubrey's crew and the sudden dimming of Aubrey's career prospects in a peacetime navy. When the Surprise is nearly sunk on her way to South America - where Aubrey and Stephen Maturin are to help Chile assert her independence from Spain - the delay occasioned by repairs reaps a harvest of strange consequences.

At the opening of a voyage filled with disaster and delight, Jack Aubrey and Stephen Maturin are in pursuit of a privateer sailing under American colours through the Great South Sea. Stephen's objective is to set the revolutionary tinder of South America ablaze to relieve the pressure on the British government which has blundered into war with the young and uncomfortably vigorous United States. The shock and barbarity of hand-to-hand fighting are sharpened by O'Brian's exact sense of period, his eye for landscape and his feel for a ship under sail.

Having survived a long and desperate adventure in the Great South Sea, Captain Jack Aubrey and Stephen Maturin return to England to very different circumstances. For Jack it is a happy homecoming, at least initially, but for Stephen it is disastrous: his little daughter appears to be autistic, incapable of speech or contact, while his wife, Diana, unable to bear this situation, has disappeared, her house being looked after by the widowed Clarissa Oakes.

Captain Jack Aubrey sails away from the hated Australian prison colonies in his favourite vessel the Surprise, pondering on middle age and sexual frustration. He soon becomes aware that he is out of touch with the mood of his ship: to his astonishment he finds that in spite of a lifetime's experience he does not know what the foremost hands or even his own officers are thinking.

Jack Aubrey and his old friend Dr Maturin are sailing on a secret mission with a hand-picked crew, most of them shipmates from the adventures and lucrative voyages of earlier years.

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.

Jack Aubrey returns from his duties protecting whalers off South America and is persuaded by a casual acquaintance to make investments in the City on the strength of supposedly certain information. This innocent decision ensnares him in the London criminal underground and in government espionage - the province of his friend Stephen Maturin. Is Aubrey's humiliation and the threatened ruin of his career a deliberate plot?

It is still the War of 1812 and Jack Aubrey - with his tetchy, sardonic friend Stephen Maturin - has set course across the South Atlantic to intercept a powerful American frigate outward bound to play havoc with the British whaling trade. If they do not come up with her before she rounds the Horn, they must follow her into the Great South Sea and as far across the Pacific as she may lead them.

While Captain Aubrey worries about repairs to his ship, Stephen Maturin assumes the centre stage; for the dockyards and salons of Malta are alive with Napoleon's agents, and the admiralty's intelligence network is compromised. Maturin's cunning is the sole bulwark against sabotage of Aubrey's daring mission. All of Patrick O'Brian's strengths are on parade in this novel of action and intrigue, set partly in Malta, partly in the treacherous, pirate-infested waters of the Red Sea.

Jack Aubrey and Stephen Maturin are ordered home by despatch vessel to bring the news of their latest victory to the government. But Maturin is a marked man for the havoc he has wrought in the French intelligence network in the New World, and the attentions of two privateers soon become menacing. The chase that follows through the fogs and shallows of the Grand Banks is as thrilling, as tense and as unexpected in its culmination as anything Patrick O'Brian has written.

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.

Captain Jack Aubrey, RN, arrives in the Dutch East Indies to find himself appointed to the command of the fastest and best-armed frigate in the Navy. He and his friend Stephen Maturin take passage for England in a despatch vessel. But the War of 1812 breaks out while they are en route. Bloody actions precipitate them both into new and unexpected scenes where Stephen's past activities as a secret agent return on him with a vengeance.

Commissioned to rescue Governor Bligh of Bounty fame, Captain Jack Aubrey and his friend and surgeon Stephen Maturin sail the Leopard to Australia with a hold full of convicts. Among them is a beautiful and dangerous spy - and a dangerous disease which decimates the crew.

In The Mauritius Command, Captain Jack Aubrey is ashore on half-pay without a command until his friend, occasional intelligence agent Stephen Maturin, arrives with secret orders for Aubrey to take a frigate to the Cape of Good Hope under a Commodore's pennant. But the difficulties of carrying out his orders are compounded by two of his own captains: one a pleasure-seeking dilettante, the other liable to provoke the crew to mutiny.