The year is 1972, the Cold War is far from over and Serena Frome, in her final year at Cambridge, is being groomed for MI5. Sent on Operation Sweet Tooth a highly secret undercover mission she meets Tom Haley, a promising young writer. First she loves his stories, then she begins to love the man. Can she maintain the fiction of her undercover life? And who is inventing whom? To answer these questions, Serena must abandon the first rule of espionage trust no one.

Ian McEwan is the critically acclaimed author of seventeen books. His first published work, a collection of short stories,First Love, Last Rites, won the Somerset Maugham Award. His novels includeThe Child in Time, which won the 1987 Whitbread Novel of the Year Award;The Cement Garden;Enduring Love;Amsterdam, which won the 1998 Booker Prize;Atonement;Saturday;On Chesil Beach;Solar;Sweet Tooth;The Children Act; andNutshell, which was a Number One bestseller.AtonementandEnduring Lovehave both been turned into award-winning films,The Children ActandOn Chesil Beachare in production and set for release this year, and filming is currently underway for a BBC TV adaptation ofThe Child in Time.

The Number One bestseller from the author of Atonement and Enduring Love: Sweet Tooth is a story of love and espionage in 1970s Britain