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.

Each internal page of the leaflet has a single, hand painted, artist stamp collaged onto it. The work was done concurrent to an exhibition "Lettrisme & Hypergraphie" held at the Galerie Stadler in 1964; the Sackner Archive holds the ordinary and deluxe edition of this catalogue. According to Frederic Acquaviva, all of the drawings were done by Jacques Spacagna including the forging of signatures. -- Source of annotation: Marvin or Ruth Sackner.