As someone who has just finished reading the entire Discworld series on my Kindle, I would like to say that while e-books on a screen are more suited towards technical documents and "look them ups," any e-ink reader is just as good as, if not better than the paper version.

People are constantly surprised at how paper-like the screen is, and I've never noticed any eye strain or fatigue, even after reading my kindle for hours.

I would seriously recommend checking out an e-ink based reader if you want to try some fiction reading. Then head over to project Gutenberg for a metric load of free, public, e-books.