Great question, Melanie! My book Wildly Affordable Organic is available on the Kindle. The smaller ebooks are currently in pdf form, but here's a page that describes several ways to convert the PDFs to Kindle.

If anyone does convert one of the PDFs to Kindle, please let us know how you did it in the comments below. I'll also put making Kindle versions on my to-do list, but I won't get to it for a few months at least.