The Lettrist movement is unique in the history of avant-garde formations. Founded by Isidore Isou in Paris immediately after World War II, it remains active to this day, having lost none of its radicalism, either aesthetic or ethical. In this book, Nicole Brenez presents the key figures and the basic concepts of Lettrist cinema, the art form within which their formal innovations proved the most far-reaching, prefiguring the breakthroughs of the nouvelle vague and the experiments of expanded cinema.