所谓“二手电子书”的概念，不但实际上难以想像，法律上也有疑问。因为著作权法中的“第一次销售理论”并不适用于网络环境，所以网络“二手电子书市场”理应不能存在。但在美国著名的 Amazon网站上却公开存在着“二手电子书”的市场，并把其销售服务提高到了几乎和新书销售相同的地位。这种事情是否存在着法律问题？笔者在文中作了探讨。 The so-called “second-hand e-book” concept, not only in fact unimaginable, the law also has questions. Because the “first sales theory” in copyright law does not apply to the network environment, so the network “second-hand e-book market” should not exist. However, there is a market for “second-hand electronic books” on the famous Amazon website in the United States, and its sales service is raised to almost the same position as the sales of new books. Is there any legal problem with this kind of thing? The author made a discussion in the text.