TechRadar: It may sound like something to do with discrete illumination in a toilet bowl, but the ComfortLight on the Kobo Glo brings the e-reader bang up to date.
In fact, with the arrival of the Kindle Paperwhite, it seems that Amazon thinks that backlighting is really the only way to sell e-readers. Barnes & Noble is following suit by selling the Nook SimpleTouch GlowLight.
The ereader market isn't especially crowded, but when they all have essentially just one job to do it can still be hard to stand out.
From worst to best, these are the ereaders you're looking for.