If you have a book in a shelf, it will appear both in the All view and the Shelves view. Going into the book in one view, then going through a few pages, exiting the book and opening the same book in the other view. You'll see it doesn't save the the location.
If you have a book in a shelf, it will appear both in the All view and the Shelves view. Going into the book in one view, then going through a few pages, exiting the book and opening the same book in the other view. You'll see it doesn't save the the location.