I subscribe to the site on Facebook and have gotten many books that way. I have only ever purchased a couple books. Just can't afford it. You can also just go to the Kindle store on Amazon and get a list of free and cheap books. Let me look for the link... *elevator music*
Okay, here are several links to sites that Amazon has posted
http://www.amazon.com/b/ref=amb_link...d_i=1286228011
And here are the free and cheap books on the site.
http://www.amazon.com/s/ref=sr_st?bb...011&sort=price Just select what category you're interested in and click on "Sort by". Choose low to high. You'll get the free books in the list.