Many moons ago I bought my first Ebook reader, it was a "Rocket Book"!  I must have read hundreds of books on that little device.  It was just about perfect.  Small and light enough (size of a paperback, weight of a hardback) that I could hold it one hand, easy thumb controls, had a backlight for nighttime reading, I could read the screen in daylight (most of the time) and it stored a bunch of books.  Heck, it even had a stylus for lookup and markup.  The day the battery no longer held a charge a small part of me died with it...