BOOK (Book Chain) is a decentralized reading exchange system based on Ethereum's side chain, covering three core functions: content publishing, reading payment copyright protection, and IP trading. In the above process, operational data recording, transparent allocation process, and key information linking will be achieved, achieving a data ecosystem in the project development process, and promoting more open and transparent project operations. Book Chain aims to incentivize readers to participate in the construction of reading communities through the reward mechanism of cryptocurrency systems and token payment reading mechanisms, truly achieving a healthy ecosystem of "free reading for readers and copyright protection for authors", and redefining book reading platforms using blockchain....