You could look at it that single-purpose devices like those ebook readers are crippled/stripped-down tablet computers. As single-purpose devices you might well wonder why booksellers shouldn't just give them away to promote their supposed primary product. Razors and razor blades, right?

And you might worry about not getting some little feature like a book light (gag me) when stuff like that is a distraction from the manufacturer's main agenda of selling books.

So get a real tablet computer instead. Then if you don't like the features the manufacturer built in, you just go to an "app marketplace" and download an app for that.

Tablets tend to have radiative screens instead of the passive "e-ink" screens, and so whether you have a night light, for crissake, is moot. You can read the screen night or day.

I know this stuff all of a sudden because I just got a Galaxy Tab 2 7" tablet, and I've seen the promised land. Hallelujah, the market for little handhelds is finally soup! Praise be to our Lord Droid in the highest!

And my little tablet has an app for reading Amazon Kindle ebooks and Barnes and Noble Nook books. Why would I spend nearly as much to get only that capability in an ebook reader?

Forget the ebook readers, bowser, and get a real tablet.