The Second Interstellar War - pitting humans and their Tadpole allies against an enigmatic alien empire - appears to have stalemated. Neither side can push through to the other's core systems without risking substantial losses, neither side can gain a decisive advantage. But when a brilliant human scientist invents a way to jump across the stars without a gravity tramline, an opportunity arises to strike the enemy in their undefended rear. It is an opportunity that cannot be allowed to pass.

On her last mission, HMS Invincible discovered an alien threat beyond human understanding. Defeat means the end of everything, the end of existence as nothing more than mindless host-bodies, the end of humanity and its alien allies alike. The stakes could not be higher. As a deeply divided humanity struggles to prepare a defense, with enemies inside and outside the human sphere just lurking to strike, Invincible is sent deep into alien space on what should have been a simple reconnaissance mission. 

The alien virus has begun its offensive, punching through the human defences and sending advance elements to threaten Earth itself. HMS Invincible and her crew, having barely returned from their last mission, are thrown into a desperate mission to strengthen the inner line of defences before the virus can smash them too and destroy the human race. The stakes have never been so high. Defeat means the end of everything.

The alliance between the Great Powers is starting to fall apart, the human economy cannot keep up with the urgent need for newer and better starships, and politicians are demanding an end to military spending. When a generation starship is detected approaching a British colony world, HMS Invincible is dispatched to intercept the aliens before they can make landfall. But the newcomers bring with them tidings of a new and deadly threat, an expansionist alien race far too close to the Human Sphere for comfort...and a sinister horror beyond human understanding.

The Royal Navy never expected to fight a full-scale interstellar war. Everyone knew the Great Powers would never risk everything on armed conflict when there was plenty of room for everyone in outer space. But when a hostile alien force stumbles across humanity's handful of colony worlds, the Great Powers must set aside their differences and fight to preserve humanity from utter destruction.

HMS Vanguard is the most powerful battleship ever to be commissioned by the Royal Navy, but she is not a happy ship. Her commanding officer is eccentric, rarely seen on the bridge; her former XO has deserted his post; and her first middy is resentful because he hasn't been promoted as he deserves.... But when a first contact mission goes badly wrong, HMS Vanguard and her crew are plunged into an interstellar war against a new and deadly alien threat.

On her maiden voyage, HMS Warspite discovered Vesy, a world populated by primitive aliens, aliens whose culture had already been twisted and warped by human refugees from the First Interstellar War. Now Captain John Naiser and his crew spearhead a diplomat mission to the alien homeworld, hoping to ease them into the galactic mainstream.

The First Interstellar War is over, but the Royal Navy still has plenty of work to do. As Earth struggles to recover from the bombardment, Captain John Naiser is placed in command of HMS Warspite - an experimental heavy cruiser - and ordered to escort a squadron of colony ships to a star system of immense strategic importance. But as the crew struggle to survive hundreds of light years from Earth, they find themselves dealing with the legacy of the war.

Six months ago, Colonel Edward Stalker and his Marines were abandoned on Avalon, left to fend for themselves as the Empire withdrew from the Rim. Since then, Avalon has been isolated from the settled universe... until now. As a mysterious pirate organisation attempts to take over Avalon, the Marines find themselves struggling against a shadowy figure with dreams of power, while a young civilian is kidnapped and press-ganged into a pirate crew.

Two years after the empire abandoned them on Avalon, Colonel Edward Stalker and his marines have established the Commonwealth, a union of worlds intended to take the place of the vanished empire. But now contact has been made with a remnant of the empire, a successor state controlled by a ruthless dictator bent on crushing the Commonwealth and expanding her rule over the entire galaxy.

Ark Royal - the Royal Navy’s outdated space carrier - has won a smashing victory against the enigmatic aliens, capturing one of their starships and returning to Earth. Now, Admiral Theodore Smith and his crew are assigned to command a fleet charged with making a deep-penetration raid into alien territory, a fleet made up of carriers from four different nations. But with a crewman who isn't what he seems, untested pilots and international friction - and a new and dangerous alien plan - can Ted and his crew survive their mission?

A new war has broken out.... Indian ships have invaded three British-held systems, and Indian troops have occupied British colonies, forcing Britain to choose between war and shame. The Royal Navy, battered by the fires of the First Interstellar War and desperately trying to recover from the terrifying casualties, must launch a counterattack and recover the colonies. For HMS Warspite - and a task force of British warships - the stakes have never been so high.

A dirty deal was struck. Humanity was allowed to keep 300 rebellious worlds. In return, we declared war on a powerful enemy from beyond the frontier. A frantic build-up of forces has begun, but the task is hopeless. Seeking allies, Earth's legions are sent to Blood World. A planet on the fringe of known space, where the people only respect masters of combat. Earth's Legions must impress them, but other alien powers have been invited to join the contest. The prize consists of billions of loyal troops - Earth must win.

The Galactics arrived with their Battle Fleet in 2052. Rather than being exterminated under a barrage of hell-burners, Earth joined a vast Empire that spanned the Milky Way. Today, Battle Fleet 921 is returning to Earth. It hasn't been seen by human eyes since our blissful day of Annexation. But what should be a joyful occasion, a chance to grovel at the feet of superior lifeforms, is rapidly becoming a nightmare.

In the fourth book of the series, James McGill is up for promotion. Not everyone is happy about that, and McGill must prove he's worth his stripes. Deployed to a strange alien planet outside the boundaries of the Galactic Empire, he's caught up in warfare and political intrigue. Earth expands, the Cephalopod Kingdom launches ships to stop us, and a grand conspiracy emerges among the upper ranks of the Hegemony military.