I don't know if anybody had the same idea before, but maybe I'm
original. 
I made a digital equivalent of a public library on my website,
containing my books. It works exactly as any public library: all the
books are owned by the library, and everybody can come and read the
books, as long as he doesn't make copies or anything, because that
would violate the rights of the author and the publisher. Since
apparently the libraries all over the world don't harm the sales of
the books, I thought, why not make the digital equivalent? So I did.
The address is http://www.danijel.org/eng/library.htm ; so, now
everybody can read my books for free (if they accept the shareware
terms), and if they get to like them, well, there are links to Amazon
and B&N. 
The files are PDF - none of that encrypted e-book stuff, and even the
PDF isn't protected from copy-pasting and printing; intentionally so,
because, as in any library, the license is purely ethical. If it works
for the software, why shouldn't it work for the literature?
So far only my first book is available - for logical reasons, because
the second one is not yet published.
Pleasant reading. :)

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Homepage: http://www.danijel.org