The Nook you can read in the dark is $40 off today only
Nook Simple Touch w/ Glowlight is essentially a Nook you can read in the dark. It released in the Spring of last year from Barnes & Noble at $139. A year later most retailers have the price down to $119, but today Best Buy put it on their Deal of the Day page and dropped it even further to $79.99 with free shipping. It's the lowest price yet on the Nook Simple Touch w/ Glowlight by x. Next best price online is $108.
Nook Simple Touch with Glowlight — $79.99 at Best Buy. List is $120.