I do most of my reading in bed. I either bury myself under the covers and prop the book against the headboard, or create a nest of pillows and snuggle down with a book in my lap. Either way, the book needs to be propped up or I find myself annoyed. This cute little reader pillow could serve my needs well. I know it's designed for ipads and e-readers, but I would totally use it for a hardcover book.
You can find this in WishForGift's etsy shop.