Awesome little book light with a powerful LED.This thing is so bright I use it as a flashlight too. The adjustable head allows you to use this little guy on books large and small. The metal clip will scratch up the cover of some books if you're worried about that. I prefer strength and quality over a few scratches on a paperback. The only issue is the power switch is small and not held in place very well. It has fallen off a couple of times. It easily pops back into place and the light is still useable without the button, but sooner or later the button is going to go missing and I'll be left turning the thing on and off with a dime.