A genre-bending story about breaking―both of the heart and form itself―from the author of Biography of X.

Adrift in the winter of 2021 after a sudden breakup and the ensuing depression, the novelist Catherine Lacey began cataloguing the wreckage of her life and the beauty of her friendships, a practice that eventually propagated fiction both entirely imagined and strangely true. Betrayed by the mercurial partner she had trusted with a shared mortgage and suddenly catapulted into the unknown, Lacey's appetite vanished completely, a visceral reminder of the teenage emaciation that came when she stopped believing in God. Through relationships, travel, reading, and memories of her religious fanaticism, Lacey charts the contours of faith's absence and reemergence. Bending form, she and her characters recall gnostic experiences with animals, close encounters with male anger, griefdriven lust, and the redemptive power of platonic love and narrative itself.

A hybrid work across fiction and nonfiction with no beginning or ending, The Möbius Book troubles the line between memory and fiction with an openhearted defense of faith's inherent danger.