'A gripping spy thriller that will appeal to fans of John le Carré, Charles Cumming, and the like ... an unputdownable novel.' Booklist Starred Review Your staunchest ally can be your deadliest enemy: a riveting spy thriller. After five years' silence, a British intelligence asset has made contact from Moscow. Claiming to be in possession of an explosive piece of information, he wishes to defect to the West. The carefully-planned operation however goes catastrophically wrong, the would-be defector ruthlessly betrayed by a rogue element at the highest level of US government. As a result, MI6's Margo Lane is ordered to deliver a message the White House won't forget. It's mission that will take Margo to the violent heart of contemporary Russia and the edge of the civil war in Syria - and finally to a terrifying personal decision she had hoped she would never have to make. Fatal Ally is a riveting, literate and almost unbearably tense thriller which explores a world where emotions are lethal distractions - and your conscience can get you killed.