There are also 25 copies of a deluxe edition one of which is held by the Sackner Archive. The introduction describes the fields of interest to lettrisme such as philosophy, medicine, logic, psychology and mathematics among others. Brief biographies of the major contributors along with their most important publications are provided. Several reprints of announcements, manifestos, and performances are included in this book. -- Source of annotation: Marvin or Ruth Sackner.

Maurice Lemaitre was conspicuously absent from this exhibition although a photograph of him in a group appears on page 44 as does a worded photograph on page 57. This is a profusely illustrated catalogue of Lettrist artworks and documents comprising 249 b&w and color photographs. -- Source of annotation: Marvin or Ruth Sackner.

This catalogue lists and depicts pages and covers from all PSI publications with the exception of individual cards. The loose sheet is a price list -- Source of annotation: Marvin or Ruth Sackner.