A compulsive tale of betrayal and its impact upon a group of flatmates and lovers, Maggie O'Farrell's second novel does not disappoint. With the sensuality, passion and emotional acuteness which characterised her debut, she has written a gripping exploration of the ambivalence at the heart of intimate relationships, a keenly observed portrayal of shifting metropolitan lives and a superbly imagined story of a haunting. When Lily moves into Marcus's flat and plunges headlong into a relationship, she must contend not merely with the disapproval of flatmate Aidan, but with a more intangible, hostile presence. Could it be that Sinead, Marcus's ex, is trying to communicate with her? When Lily begins to 'see' Sinead first about the flat, and then on the streets of London, she must question not merely her sanity, but whether the man she loves is someone she can, or indeed ought to live with at all.