From the author of the bestselling At Risk comes a tense and fast-paced new thriller featuring MI5 Intelligence Officer Liz Carlyle. When Liz Carlyle learns that suspicious meetings have been taking place at an Islamic bookshop, she feels instinctively that a terrorist cell is at work. She reports this to Charles Wetherby, the Director of Counter Terrorism, who immediately puts a surveillance operation into place. So Liz is shocked when Wetherby suddenly takes her off the case after receiving a tip-off that a mole has been planted in one of the branches of British Intelligence. Now Liz must undertake the momentous task of uncovering and exposing the mole before it's too late.