Have found that it is two different books (I'm on my second way through) the only thing I found the first time; cause I kept it in the inventory; was that the quest was completed before I had time to offer it.
The second time IIRC I'd stashed the book in the BF (the container close to Arrabella) and the quest still finished early. So I found that just picking up the book was enough.
Who wants a footware that you can't sell till the next act anyway? Though the XP can be useful.
marts