Liz Carlyle

For MI5 officer Liz Carlyle, the nagging complications of her private life are quickly forgotten at Monday's counter-terrorism meeting. An invisible may have entered mainland Britain.

An 'invisible' is a terrorist who is an ethnic native of the target country, who can cross its borders unchecked and move about unnoticed - the ultimate nightmare. By the time they're identified, it may be too late.

The intelligence operation that follows will test Liz to the limit. Who or what is the target? Where and who is the invisible? With each passing hour the danger increases.

But as Liz desperately sifts through the incoming intelligence, she finally realises a truth that could prove deadly: her ability to get inside her enemy's head is the only hope of averting disaster...

But the clock is ticking - and anyone could be at risk.

Book 1 in the Liz Carlyle series.

When Intelligence Officer Liz Carlyle learns from one of her agents that suspicious meetings are taking place at an Islamic bookshop, she trusts her instinct that a terrorist cell is at work. Her boss, Charles Wetherby, immediately puts a surveillance operation into place. An attack seems imminent.

So Liz is surprised when Wetherby suddenly takes her off the case. And she's shocked to hear the reason why: he has received a tip-off that a mole is at work inside British Intelligence. If true, then the potential damage to the Service itself could be immeasurable. Now, as her colleagues scramble to avert a terrorist strike, Liz must find out who the mole is, and what their intentions are, before it is too late.

Book 2 in the Liz Carlyle series.

When MI5 intelligence officer Liz Carlyle learns of a Russian government plot to kill super-rich Nikita Brunovsky - a man who openly criticises the Putin regime from his London base - it's a race against time to track down the killer. How the man is to be silenced is unclear, but the Foreign Office dreads any kind of incident and Liz must work fast to protect him.

As she goes undercover, desperately trying to find out who in Brunovsky's retinue might betray him, Liz discovers that an 'illegal' Russian agent has arrived in London. Is this the assassin she is seeking? Under an assumed name, caught up in the high-octane world of the oligarchs, Liz soon finds herself in terrible danger...

Book 3 in the Liz Carlyle series.

Geneva, 2012. A Russian intelligence officer approaches MI5 with vital information about the imminent cyber-sabotage of an Anglo-American Defence programme, but refuses to talk to anyone but Liz Carlyle.

At a tracking station in Nevada, US Navy officers watch in horror as one of their unmanned drones plummets out of the sky, and panic spreads through the British and American Intelligence services. Is this a Russian plot to disable the West's defences? Or is the threat coming from elsewhere?

As Liz and her team hunt for a mole inside the MOD, the trail leads them from Geneva, to Marseilles and into a labyrinth of international intrigue, in a race against time to stop the Cold War heating up once again...

Book 7 in the Liz Carlyle series.

Liz Carlyle and her Counter Terrorism unit in MI5 have been charged with the task of watching the international under-the-counter arms trade and have become increasingly concerned that extremist Al-Qaeda jihadis are building their power base ready to launch an attack. As the pressure mounts, Liz and her team must intercept illegal weapons before they get into the wrong hands.