Playful, ambitious, and exquisitely imagined, What Is Not Yours Is Not Yours is cleverly built around the idea of keys, literal and metaphorical. The key to a house, the key to a heart, the key to a secret—Oyeyemi’s keys not only unlock elements of her characters’ lives, they promise further labyrinths on the other side.

In “Books and Roses” one special key opens a library, a garden, and clues to at least two lovers’ fates. In “Is Your Blood as Red as This?” an unlikely key opens the heart of a student at a puppeteering school. “‘Sorry’ Doesn’t Sweeten Her Tea” involves a “house of locks,” where doors can be closed only with a key—with surprising, unobservable developments. And in “If a Book Is Locked There’s Probably a Good Reason for That Don’t You Think,” a key keeps a mystical diary locked (for good reason).