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Although cheap and easy-to-read paperback books and e-books have been widely loved by readers, hardcover books have not been eliminated.Apart from still only do hardcover classic books. Most hot selling novels will have two versions: paperback and hardcover for choice.Why is the publishers willing to do this kind of repetitive "useless work"?The traditional practice of European and American publishers is to publish new books in three formats at different intervals. The hardcover edition is the first, which is used to attract book fan... more