M Train begins in the tiny Greenwich Village caf where Smith goes every morning for black coffee, ruminates on the world as it is and the world as it was, and writes in her notebook. Through prose that shifts fluidly between dreams and reality, past and present, we travel to Frida Kahlo's Casa Azul in Mexico; to the fertile moon terrain of Iceland; to a ramshackle seaside bungalow in New York's Far Rockaway that Smith acquires just before Hurricane Sandy hits; to the West 4th Street subway station, filled with the sounds of the Velvet Underground after the death of Lou Reed; and to the graves of Genet, Plath, Rimbaud, and Mishima.

Woven throughout are reflections on the writer's craft and on artistic creation. Here, too, are singular memories of Smith's life in Michigan and the irremediable loss of her husband, Fred Sonic Smith.

Braiding despair with hope and consolation, illustrated with her signature Polaroids, M Train is a meditation on travel, detective shows, literature, and coffee. It is a powerful, deeply moving book by one of the most remarkable multiplatform artists at work today.