Okay, just so you know, and this is definitely not a hint to buy Lyssa Medana's stuff...
You can get free apps for your computer or smart phone here
Not only can you buy books, but there are a shedload of books that are
copyright free, like Treasure Island etc which are free like these. So you could download these apps for free on your pc/phone and then get armloads of books for free from them!
There is also a thingy called Kindle Owners Lending Library where you can borrow books for free, see here. I think you actually need the Kindle for this, but it may be worth a go, there look to be some cracking books on it.
I didn't know about this. I haven't got a kindle. Yet.