I downloaded Amazon's Kindle for PC today. It's a fast transfer and setup. The screen offers sharp text, easy on the eye. The medium-dark gray side boundaries add to eye ease. The accompanying image doesn't do it justice.
Graphics within books are very good.
Text size and number of words per line are easily adjustable. The text is navigable, but the books I've downloaded are not searchable.
It's worth a try. A good number of free titles are offered, including classics such as Pride and Prejudice and The Adventures of Sherlock Holmes. You can find contemporary novels, too. Among those at the moment are Elizabeth Moon's Trading in Danger and The Black Sea Affair, by Don Brown. (Note that that last is Don Brown, and not Dan Brown. Given similar genres, I wonder if the byline is intentional.)
Kindle titles of course include some of my books. At the top of the list are On the Way to the Web and Blogging Heroes.
You can download a sample (the first few pages of a book) of any book free. Prices vary, and there are some real bargains in the Kindle Store--which is only a click away from the Kindle PC reader. I foresee lots of impulse buys