Sorry, not a quick reader, so no help there, but...
Look into services at your public library. Where I'm at, if you have a library account, you can download books from an online service to your Kindle for a period of time free of charge! Call them and ask!
I agree check out the library. I was having a hard time lending/borrowing books with other people, because most of the books I was interested in were not able to be lent to others, so I turned to the library. I had to put my name on a bunch of wait lists at first, but once they started coming in I've had a steady stream of free books.
Re: NBR: Kindle users come in
Sorry, not a quick reader, so no help there, but...
Look into services at your public library. Where I'm at, if you have a library account, you can download books from an online service to your Kindle for a period of time free of charge! Call them and ask!