GerryWright: Information from the Book of Lore is needed to finish the game. After asking every NPC I thought might know of it, I was unable to find clues as to its whereabouts. So, I went online and it looks like it was originally included in the boxed version of the game. Unfortunately, the Gog package I bought doesn't have it included. If anyone else is in the same situation, I found a PDF copy of it at the link
http://www.replacementdocs.com/download.php?view.960 If you used GOG Galaxy to download Ultima V, click on the "Extras" tab to find out where to download the manuals.
If you downloaded the game from the gog.com/en/account page, then on the right side of the screen there is a section called "EXTRAS" where you can download the manuals.
The manuals were *very important* to play games back in the day. I'm quite surprised you were able to get very far in the game without reading the manual. You should try to read the manual, lorebook, spellbook, reference card, and look at the map in their entirety before playing the game. You don't need to read the cluebook or the interview with Richard Gariott.