Used book – Double Love, Joyce Carol Oates, Anne Rabinovitch

Molly Marks, a beautiful twenty-seven-year-old woman, decides to undergo therapy - more out of idleness than necessity - with Dr. Jonathan McEwan, who soon becomes her lover. He tells her that he has an identical twin brother, James, who lives in New York, is also a psychiatrist, and with whom he has been estranged for ten years. Determined to discover the reason for the rift between the two brothers, Molly introduces herself to James McEwan under a false name. And she becomes his mistress... From then on, she constantly compares the twins: their quirks, their way of making love, their handwriting... But Molly's maneuvers gradually turn against her...