Does Dunnington 2 mean we completely ignore the first Dunnington book then? I mean, No. 2 does describe itself as 'Ultimate'...
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You can look at them both. The "ultimate" was an significant upgrade of the first. I had the first book for a long time and didn't want to buy the upgrade because I didn't think there would be much difference. Then I saw a review which said there was a big difference so I bought it and yes there's a lot more in the 2nd.

The reason I made clubs for both Dunnington books was for someone who only had one book or the other.
I made the "BOOK' clubs mainly to provide example games of the openings for members to study. I could have just published a list of the games but including the book title gave those games integrity.
At the time I wasn't sure if the website would allow me to do that because of copyright issues. So there are only the games and none of the text. The games are public domain, and I am saying that the BOOK clubs are study aids for the people who own the book. I believe that is well within copyright allowances.
I've never heard anything from the website concerning the BOOK clubs.

@Nonotanymore
I have sent a challenge. https://www.chess.com/votechess/seek/247782
Please check and if it is OK accept it tomorrow.
Ok, references are now displayed and linked on the main page. There are other books on the KIA, but I think those three are the best for the KIA nuubee.
I have always geared my clubs towards the person (the beginner, the nuubee) who wants to know and understand the opening. There have been clubs for advanced KIA players but they didn't do very well, they didn't last.