@ Wilki & Bazer, thanks guys - I hope you've been enjoying the original
@ Arcus - Collector's Guides fall under the category of "fair use" for related images, etc. However as Woodsman mentioned, the people at EA (the Ultima Team in particular) have gone above and beyond in terms of their support. They've offered feedback & encouragement, checked on missing information, supplied art assets and much more. Both books have been verified by EA's legal department to ensure proper (C) & TM notices, etc.
There is a LOT of red tape involved when classifying something as an "official" product... Just for one example "Ultima: Escape From Mt Drash" in the Ultima book. It was created & published by Sierra On-Line who no longer exist. Most of their things now fall under Activision, but that would open up a whole new can of worms... While Ultima is obviously an EA trademark, the original game was not connected to Origin Systems at all. That alone would be a pretty hefty potential legal rights headache for something I'm sure Activision has never even heard of. There's also the issue of covering things like Tabula Rasa in the companion guide which is owned by NCsoft, Lord British's "Ultimate RPG" which is owned by Portalarium, etc.
While I'd certainly love to have "Official" status it would likely result in limitations on the items I'd be able to cover. Being unofficial gives me a lot more flexibility, and (again to their credit) EA never requested I change or censor anything in order to pass their approval.
@ Lord Frodo - I presume you're aware that real books cost money, but I'll let you know if I ever put together an in-game edition.
@ Woodsman - Thanks for clarifying all of that for everyone
While it hasn't been posted directly on UO Herald yet, Ultima Codex is actually the guides' official home now which is linked. There's also the video
Paul Barnett posted about the original