Waterproof smartphone makes perfect sense, especially if you happen to live in a tropical country and need to capture a photo when it rains all of a sudden. Or how about a day by the river, where you and your family have a fun picnic moment, and would like to get wet playing with Supersoakers? A waterproof e-book reader, however, does raises eyebrows as there might not be such a huge market for it. This has not stopped Russian e-book maker PocketBook from introducing their latest water-resistant model that comes with a 6” E Ink display.