A lyrical and honest portrait of illness and the way it changes life and faith, from the award-winning author of Things Seen and Unseen. In the winter of 2009, Nora Gallagher was told she had an inflamed optic nerve, cause unknown, that if untreated would leave her blind. With this news, and the search for a diagnosis and treatment, her once busy and fast-moving life tunneled into a quieter country she calls Oz:  unfamiliar, slower, deeply rooted in uncertainty and vulnerability. Moonlight Sonata at the Mayo Clinic, written as Gallagher was still recovering, is a moving meditation on serious illness, what helped her through and what didn’t, why a wall exists between the sick and the healthy, and what can take it down partway. It is also a testament of modern faith—accepting of both science and intellect—and a hard-won revelation of what lies at the heart of ordinary suffering.