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We have a series of books that we want to share them as FREE distribution, not for commercial purpose. In the past the book was printed for free distribution, and the printed books could not meet the huge demand. And many queries regarding the books keep on sending to the distributor for the free book.
So we are on the way to find a good solution and type file to publish them as free eBooks which is more convenient. But at the same time, we do not want other people take this advantage and publish them as commercial printed books.
So we now understand that it is impossible for preventing printing. But now the question left is which TYPE FILE is popularly supported among device.
ePub is also good but some low-tech device cannot open it.
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