Francesco Conz contributes an afterward "Lettrisme: The Forgotten Avant Garde." Roland Sabatier wrote about Isou's novel "Initiation a la Haute Volupte" (Initiation inot High Sensual Pleasure) and also contributed an essay "Poetry and Music:From Lettrisme to Excordism through Aphonism and the Infinitesimal." The fabric prints of Isou published by Conz, that are reproduced in this book, are also held by the Sackner Archive. -- Source of annotation: Marvin or Ruth Sackner.