Barnes & Noble just officially announced the Nook Simple Touch with GlowLight, its latest Nook family member. The new eReader offers something no other mainstream E Ink eReader has offered before – a backlight. That means you can read in the dark without having to turn on a lamp or an overhead light. We tested it out this morning (be sure to check out our hands-on) and absolutely fell in love with the device. It’s pretty much the exact same eReader as before, only slightly lighter and with the company’s new patent pending backlight technology. Barnes & Noble is accepting pre-orders for the Nook Simple Touch with GlowLight now and it will be available in early May. The best part? It’s just $139.99.