Jean Tinguely sent letters that incorporated drawings, prints, and collages to his patron, Paul Sacher, beginning in 1973. These collages are reproduced and described in this book along with a personal biography and photographs of the artist with Paul and Maja Sacher who were heirs to Hoffamnn-La Roche Pharmaceuticals. Paul Sacher became Chairman of the pharmaceutical firm while still conducting music at a serious level. This biography also describes the couples art collecting experiences. Paul Sacher was also an important collector of music scores and a symphonic conductor. A letter by Tinguely is reproduced as a colored photolithograph along with an analysis of its contents. The analysis is sometimes accompanied by the reply from Sacher.In addition to the letters to Sacher, the book includes letters to Pierre Boulez, the composer and Fritz Gerber, Chairman of the Board of Hoffman-La Roche. A section of the book includes colored photolithograph letter drawings to Paul Sacher from Niki Saint Phalle, the artist and widow of Tinguely. These are accompanied by explanations. -- Source of annotation: Marvin or Ruth Sackner.