Amazon Prime Day 2017 is officially underway, and right off the bat we have a great Amazon Kindle Paperwhite e-reader deal. But you have to act fast.Amazon Kindle Paperwhite is $30 off until midnight, meaning you only pay $89.99 for the best-selling Amazon e-reader. That's a steep price drop from the normal Kindle Paperwhite price of $119.99.This isn't...