Sixth months later, some more comments are added...
I have the Barnes & Noble “Nook” e-reader, and I love it. My wife has the Amazon “Kindle”, and she loves it too. Prices have come down a lot from a year ago. Both have WiFi only versions now, minus the 3G. I have the Nook WiFi only, which is perfectly acceptable to me, there have never been any times where I wanted a new book and didn’t have access to a network. The Kindle has recently been updated and is about $10 less than the Nook without the 3G.
Both of these readers use the e-ink technology, which means there is no backlit display and therefore absolutely no glare. You can read for hours without fatigue, the display is the same as if you were looking at a printed page. Of course, you will have to turn on a light if it is dark, this is not an i-pad. You do not have to worry about uncomfortable positions lying on the bed or worrying about the binding; simply get as comfortable as you can, then prop up the reader and use one hand to click-click-click through your book. Resizable fonts, automatic bookmarks, search functions, jump to chapters, what is not to like?
Download as much free material as you like for books published pre-1923. The Nook automatically uses the EPUB format. The Kindle is a little more restrictive on formats, but you can do easy conversions using freeware software. The primary differences are that the Kindle has a longer battery life and a larger selection of books, while the Nook can recognize a larger selection of document formats, and the battery can be replaced and the memory upgraded.
Beware of any attachment to the printed word if you get one of these.
"It will take an amazing amount of control,” she mused. “More even than Carlisle has. He may be just strong enough…the only thing he’s not strong enough to do is stay away from her. That’s a lost cause.”