I’m empathetic to book publishers who can sell their books for only $13, but the cost for Amazon to send me an eBook should be much much less than a hardback book.

Also, using your computer you can download free books for your Kindle directly from the source at Project Gutenberg http://www.gutenberg.org — the original source for most of these free books no matter which website they end up on. Search on Author and Title, find a book, and then scroll down through the resulting book information until you see the section labeled Format … Mobipocket. Right click on the Download Link to download the Mobipocket file to your computer and from there to your Kindle’s documents directory — Mobipocket files aka .mobi or .prc are basically the same file format as Amazon’s paid book format, except that the free books do not contain DRM — Digital Rights Management — restrictions that keep you from copying and sharing books. This is possible since the books are pre-1932 where copyright has expired, allowing you to freely copy these books.