Well said about the Jones book.
Yes, I'm an OTR fan and that Dunning book is awesome (makes a good book end too). For those that don't know, it's full of historical info and background from a few paragraphs long to 4 or 5 pages long on practically every old radio show made.
Lots of OTR on my "someday" list but my favorites so far are Gunsmoke, Dragnet, Yours Truly Johnny Dollar (Bob Bailey), Sherlock Holmes (Rathbone and Bruce), Great Gildersleeve, Amos and Andy, X Minus One and Dimension X. In no particular order except for Gunsmoke.