Genocide

Years after leaving UNIT, Jo Grant recieves a plea for help from an old acquaintance. A palaeontological study of the earliest known humans is apparently under threat from a UNIT force led by a captain who does not officially exist. Investigating further, she begins to find herself out of her depth — and out of the twentieth century altogether...
Meanwhile, the Doctor and Sam visit Earth in 2109 — but there is no trace of the human race. Earth is the home of the Tractites, a peaceful race who have been living there for hundreds and thousands of years. Astonished and appalled, the Doctor travels back in time to see just what went wrong in Earth's pre-history.
Why have Jo and the expedition been taken back in time? Are the Tractites all they seem? Finally, separated from the TARDIS, the Doctor's last chance to put things right rests with Sam — but has even she turned against him?

The Bodysnatchers

It is London, 1894. Amid the fog, cold and degradation a gruesome business is being conducted: bodysnatchers are at work — bodies of men, women and children are being stolen from their graves for the sinister purpose of a mysterious gentleman.
When the Doctor and Sam arrive, they are witness to a horrifying scene in the evil-smelling fog: something rises up from the filthy waters of the Thames and devours a man — a man terrified for his life and on the run from the devil himself...
Teaming with an old friend, pathologist Professor George Litefoot, the Doctor is determined to get to the bottom of the mystery. Together with Sam, they discover there is a far graver threat facing London than just earthly grave robbers. Deadly alien beings the Doctor has encountered before are at work, and they bring a whole new twist to the word 'bodysnatchers'...
Featuring the Zygons, who battled the Fourth Doctor on TV in Terror of the Zygons

Vampire Science

In the days when the Time Lords were young, their war with the Vampires cost trillions of lives on countless worlds. Now the Vampires have been sighted again, in San Francisco.
Some want to coexist with humans, using genetic engineering in a macabre experiment to find a new source of blood. But some would rather go out in a blaze of glory — and UNIT's attempts to contain them could provoke another devastating war.
The Doctor strikes a dangerous bargain, but even he might not be able to keep the city from getting caught in the crossfire. While he finds himself caught in a web of old feuds and high-tech schemes, his new companion Sam finds out just how deadly travelling with the Doctor can be.

The Eight Doctors

'Trust the TARDIS...'
Recuperating after the trauma of his recent regeneration, the Doctor falls foul of a final booby-trap set by his arch-enemy, the Master.
When he recovers, the disorientated Doctor looks in a mirror and sees the face of a stranger. He knows only that he is called "the Doctor" — nothing more. But something deep inside tells him to trust the TARDIS, and his hands move over the controls of their own accord.
The TARDIS takes him to a strangely familiar junkyard in late-nineties London, where he is flung into a confrontation between local drug-dealers and Samantha Jones, a rebellious teenager from Coal Hill School.
But the Doctor soon finds the TARDIS transporting him to various other places in order in order to recover all his memories — and that involves seeing seven strangely-familiar faces...
This novel is the first in a new series of adventures featuring the Eighth Doctor.