Peter Johnson's book is like a very rough first draft written over 50 years ago. It is so full of incorrect information and ideas as to be only interesting as a Parker historical artifact. Similarly Larry Baer's Parker books, which do show some great Parker Bros. guns, are getting very out of date.
Ed's books are good reads, but are written like the lawyer he was. He presents all the facts to support his Parkercentric position and flat ignores all other facts. They are the best books to read.
The Parker Story is the diffinitive work. Anyone really interested in Parker Bros. guns needs a set, along with the several erata sheets.
From everything I've heard the serialization book is so full of transcription errors I've never purchased a copy.
