I enjoyed it. As far as Elvis goes, there isn't a lot of detail there. She liked him, and has nothing bad to say about him. For me the value in the book was in it telling what went on in the days after Elvis Died, up through Vernons Death. That was stuff I had never heard spoken of often. Its a fast read, maybe 2 hours if you're in a reading mood. There are better books you could buy about Elvis, but none of them cover much of the stuff She does in that book.
Good luck hope you find it in time if its a gift.