Do you know you don't need a Kindle to read any Kindle book? Amazon has a freeware program called Kindle for PC which allows you to download Kindle books to your desktop and laptop.
I did that HRT. I have both on my laptop and so I can read books from either website. I see who is offering the cheaper book, but also I can borrow from people from either site which is wonderful.
I don't have a kindle and read kindle books off my iPad, iPhone & iMac, I like. I will get one though for my mother in law for Xmas so I'll see what that's all about. I'll get it a bit early and take it for a few rides, test out the engine, tires and breaks.
The link for it is here: Kindle for PC
There's also Nook for PC program from Barnes and Nobles, too. The link is here: Nook for PC
With these installed, you can now download free or cheap books from these two sites. That's a good deal to me.