People today use their smartphones for almost everything. Sometimes that even includes reading, at least in as much as can fit inside that relatively small screen. But while it might be convenient, reading from such screens aren't always the best, nor the healthiest, especially come night time. That is why different reading apps, as well as full-colored book readers, are now offering some for of night mode reading. Google's Play Books app is just one of the latest to join that trend to help lessen the strain on your eyes while keeping you hooked on that gripping novel.