Meet the needs of different readers in the market. JD。 COM books cover a wide range of products. According to different readers, JD's different authors. COM books have different requirements and reading emphases for the same book, and there are many unedited versions, simplified versions, various translated versions and collected versions. These editions are designed to meet the needs of different readers in the market. There are also more typical classics entering the public domain, and the copyright is no longer in the hands of the author.