Hi Caroline and welcome to MR. Check out the
eBook section for free downloads - those are all books out of copyright lovingly formatted by MR members. Also hang around for fun & nice people.
If you have any questions regarding your reader, I'm sure the folks over at the
Kindle forum will be more than willing to help. So don't hesitate to ask any questions. Would be a shame if you get frustrated with the Kindle because of an un-asked questions.