Right now, our budget is tight, but I would like to invest in a good book light that I could use on any book, be it hardcover or softcover, of any size, and do so easily. After all, there are many nights when Toodles is ready to go to sleep, but I'm just not yet. For the time being, I can play the DS with a built-in light, but I would love to read a book several nights. What recommendations can be given?