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.

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.

On her last cruise, HMS Vanguard - the most powerful battleship in the Royal Navy - barely survived her encounter with a deadly new enemy. Now, with her commanding officer accused of everything from mutiny to dereliction of duty and her crew under a cloud, the Royal Navy doesn't quite know what to do with her. But there's still a war on. And Vanguard must return to the front lines. Assigned to a task force heading to assist humanity's alien allies, Vanguard and her crew find themselves caught in a deadly alien trap.

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.

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.

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.

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 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.

Humanity is losing the war. The once-mighty space navies have been crippled, officers and crew have been stretched to the limit and Earth herself has come under heavy attack. The end cannot be long delayed. For Admiral Smith and the crew of HMS Ark Royal, the stakes have never been so high. The one hope is to make contact with alien factions that might oppose the war.

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 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. Our only worthwhile trade goods are our infamous mercenary legions, elite troops we sell to the highest alien bidder. In the third book in the series, James McGill is deployed on another alien world. His third interstellar tour is different in every way. Rather than meeting up with a primitive society, this time he’s headed to an advanced world.

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.

When the Earth is invaded by a rival empire, James McGill's legion must defend the Home World. The top brass has complex plans, but none of that matters much to McGill, who chooses his own unique path. Traveling to star systems no human has ever visited, he searches for a technological edge to beat the enemy before it's too late. Along the way he unleashes new terrors, triggering the biggest battles in human history.