http://www.amazon.com/gp/product/B004DOTKPK/ref=wms_ohs_product_img

This is the best I have found. Two brightness settings. Good grip. Pretty wide angle of beam spread. For a text book, you'll still have to adjust it a bit as you read but it's not a big deal. Feels like this light will last for quite some time. Not cheap junk at all.