We have all seen those clip on reading lights for reading books in the dark. There are even reading lights built into book covers. The LED pagelight though is the first one we have seen that can light up an entire page evenly.
Four AAA batteries and side firing LED's give you 40 hours of reading time, a dimmable light source and a bookmark that you will never lose....all in one slim package. Avaialble here for $25.