Sleep when you're dead / Jude O'Reilly.

In thirty-six hours, thousands of innocent people will die. There's not a second to waste. And no time for sleep. Michael North has a bullet lodged in his brain which could kill him any second. That makes him the perfect MI5 asset: he's ruthless, loyal, brave. And, best of all, disposable. Teenage computer expert Fangfang Yu does not feel the same way. She's determined to keep her friend out of danger - however many cyber laws she has to break to keep him alive. Now North has been sent undercover into a doomsday cult on a remote Scottish island. He has thirty-six hours to stop their charismatic leader from inciting the murder of thousands. He can only do it with Fangfang's help - but when they uncover a shocking link between the cult and the dark heart of the US defence establishment, it doesn't just put North's life at risk... it threatens Fangfang too.