This book was designed by Richard Eckersley and is one of the most outstanding examples of experimental book design for a non-fiction book of the 20th century. The main text is formatted in terms of indexing like the white pages of a telephone directory and the footnotes and index are printed on orange colored pages to simulate the yellow pages. The page layouts include mixing of fonts, fragmenting sentences, overprinting, sentences constructed like Parole in Liberta, and interspercing of diagrams.The first part of the text deals with the philosopher, Heidegger's Nazi leanings and how one of his subsequent excuses related to a telephoned request for action. The following sections continue to attack his philosophical theories as well, with themes of psychoanalysis and telephone calls, and the place of the telephone in American society. Alexander Graham Bell and his relationship with Helen Keller are described as well as his work with Thomas A. Watson. "Remember: when you're on the telephone, there is always an electronic flow, even when that flow is unmarked. The Telephone Book releases the effect of an electronic-libidinal flow using typography to mark the initiation of utterances." -- Source of annotation: Marvin or Ruth Sackner.