My books of infinite spells keep duplicating when i change page.

I now have seven books all with spell turning , I can still turn pages
on most of them as well.

Anyone else seen this feature ( i have just added the disk no patches)

Sounds like a bug.

Yes it is a bug, and afaik has never been squashed.
I was able to duplicate the book endlessly. This was with ToB installed.

Haven't tested it yet, but this sounds like one nice bug indeed.

Welcome Killgore!!