I have a couple books that are not in the last DP guide. They are:
Electronic Games
ISBN number: 0-531-04396-7
Pages: 64 including index
Author: Fred D'Ignaio
Publisher: Franklin Watts
Date: 1982
Black and White
The book talks about computers, handhelds, consoles and arcarde games
The Best Texas Instruments Software
ISBN: 0-517-42476-2
Pages: 160
Author: "From the editors of Consumer Guide"
Publisher: Publications International Ltd.
Date: 1984
Black and White
As stated in the title, this book covers a lot of software. Page 69 to 146 is dedicated to games. This is an interestig book becuase it offers a review and info about what genre, who made it, requirements, price and format as well as warranty periods.
I hope this helps. It would be cool to think I had contributed something to the next guide.