I've owned quite a number of book lights and this one is the best so far.  It's light and can clip to the book. The gooseneck allows for adjustment but I didn't need to move it around because the light is sufficient to light both pages of the book.  The light is also pleasant to read by.  I like that you can switch to from 1 to 2 bulbs, which can conserve battery life if I only need some light and not too much.  And the book light can stand on its own.  I didn't think it could do that until I set in on my desk and I was surprised.  It can be a mini-desk light.  I'm quite pleased that because of it's size, flexibility and large clip, I can probably even use it as a flashlight in tight spaces.  Certainly worth the price plus I love that it comes in purple!