This is a novel about the persistence of longing in which the twin lives of the title character blur and overlap. Bird puts her child on the bus for school and passes the day with her baby. Interwoven into the passage of the day are phone calls from a promiscuous, unmarried friend, and Bird's recollection of the feral, reckless love she knew as a young woman. It's a day infused with fear and longing, an exploration of the ways the past shapes and dislodges the present.

In the present moment, Bird dutifully cares for her husband, infant, older child. But at the same time Bird inhabits this...