Tune In Yesterday, published in 1976. The publisher subtitled this The Ultimate Encyclopedia of Old-Time Radio, but it must not have been too ultimate. On The Air, published by Oxford in 1998, contained at least three times as much data.
Deadline, American hardcover edition. The book is almost sedate compared with its illustration. Some people refuse to read it because of the jacket, but this was a talented young artist’s vision of the novel.