Probably not the book you are thinking off, since it’s just about the AT&T incident, but “The Day the Phones Stopped Ringing” by Leonard Lee is a detailed descr

Probably not the book you are thinking off, since it’s just about the AT&T incident, but “The Day the Phones Stopped Ringing” by Leonard Lee is a detailed description of the event. It’s been many years since I read it, but I recall it being a very interesting read.