"Tubelore" is a great reference and is interesting reading. I had the pleasure of reviewing the first edition for "CQ Magazine" several years ago  (well perhaps more than several  ).   There are several references to the book on different sites but unfortunately they state that the book is no longer available. However the latest version "Tubelore II" is available on Electric Radio's site in their store.
Z


http://k4che.com/CQtube/CQTubeLore.htm