My Husband's Wife by Alice Feeney is a twisty psychological thriller about Eden Fox, an artist who returns from a run to find a woman who looks exactly like her living in her home with her husband, Harrison, who claims the imposter is his wife, while a second storyline follows Birdy, a lonely woman with a grim diagnosis who inherits the same house and uncovers a mysterious clinic predicting death dates, all weaving into a complex tale of stolen identity, secrets, and unreliable narrators at the enigmatic Spyglass estate.