This is the trouble with "new" ways of doing certain things. If you buy a book, the printer gets paid for the paper and printing, the publisher gets his commission and the author gets the fee to which he is entitled. When you have read the book, you can then lend it to anybody else you like who can read it as well for no extra cost. Libraries do this ad infinitum. However now you expensively own a mechanism for reading the written word, it is impractical to lend it to someone else to read the same thing as you may well have other reading to do, but because of copyright, you are not allowed to loan them the file so they can read it themselves. Good business for publishers and authors who now get more than their just deserves - if the system catches on!
P.P.