At the time of his death in April 1987, Levi was working on another selection of essays called "The Double Bond," which took the form of letters to . These essays are very personal in nature. Approximately five or six chapters of this manuscript exist. Carole Angier, in her biography of Levi, describes how she tracked some of these essays down. She wrote that others were being kept from public view by Levi's close friends, to whom he gave them, and they may have been destroyed.