This part of the error message implies that your are right to suspect it is coming from your LoreBooks addon:
Code:
EsoUI/Ingame/CenterScreenAnnounce/CenterScreenAnnounce.lua:1521: in function 'setupFunction'
|caaaaaa<Locals> self = [table:1], messageParams = [table:3]{mainText = "Book added to librarian",
priority = 1, sound = "Book_Acquired", queuedOrder = 9, category = 2, key = 25},
largeMessageLine = [table:2], poolKey = 1, largeMessageControl = ud </Locals>|r
I'd try turning that one off first to see if the problem goes away with that addon.