YES. I would love an end all, be all Guidebook for every Kingdom Hearts game ever released! It could be arranged based on Story (with the Full Blown Timeline at the end of the Story Section), then Character Files, Game Guides, Item Info (Complete with pictures for every item in the games. And they could create images for items that never had them (such as KH1 exclusive items, like the Pretty Stone)), Ability Info (Comprising of all Attacks, Magic, Commands, Passive Abilities (Like Treasure Magnet), and Special Moves (Like Reaction Commands, the Command Styles, and the Drive Forms)), Multiplayer Details (For the games that had them), and a Secrets section for the little, unnoticed things that have significance to the series or are there just for fun (Such as item Cameos that are in other series, or the infamous Bug Island Glitch in KH1). It would be huge (Likely bigger than the Pokemon Platinum guidebook), and have a fairly high price tag, but if such a book found its way to american shores...It would be worth every penny.
But what would it be called...? I have a few name ideas...
The Kingdom Hearts Ultimate Encyclopedia: The Final Resource on everything contained within the World of Kingdom Hearts.
Lexicon of the Keyblade: The Door to every detail found within the Universe of Kingdom Hearts.
Any other cool names?