BOOK (Book Chain, Book Chain) is a decentralized reading exchange system, covering the three core functions of content publishing, reading payment copyright protection, IP transactions and other Ethereum side chains. In the above process, the operation data recording, the transparency of the distribution process, and the chaining of key information will be realized, so as to realize the data ecology in the project development process and promote the project operation to be more open and transparent. Book Chain aims to encourage readers to participate in the construction of the reading community through the reward mechanism of the encrypted digital currency system and token payment for reading, so as to truly realize the benign ecology of "free reading for readers and copyright protection for writers", redefining it with blockchain book reading platform.