隨著互聯網服務成為我們生活中不可或缺的一部分，新技術開始滿足我們的各種需求和娛樂需求。借助互聯網，圖書發行進入了一個新時代，新技術已經迎來了各種新服務，以便為用戶提供更好的閱讀資源以及改進的獲取和銷售方式。同時，區塊鏈由於其提供的發明功能而開始吸引許多用戶，去中心化和智能合約為改善在線應用程序提供了一系列可能性。借助區塊鏈，我們設計了一個市場，用戶可以在該市場中買賣具有分散式應用程序可以提供的所有優勢的二手書。在接下來的研究中，我們提出了一個基本的智能合約，以可視化區塊鏈對於二手書在線交易的潛在收益或困難。此外，我們為區塊鏈用戶設計了一個基本應用程序，該應用程序可作為一個簡單的市場，專注於隱私和降低成本。

As internet services become integral parts of our lives, new technologies start to fulfill our various needs and entertainment. Book distribution has entered a new era with the help of the internet, and new technologies have ushered various new services in order to provide users with better reading resources and improved ways to obtain and to sell them. At the same time, blockchain has started to attract many users due to the inventive functions it offers, with decentralization and smart contracts offering an array of possibilities to improve online applications. With blockchain, we design a marketplace where users can buy and sell second-hand books with all the advantages that decentralized applications can offer. In the following study, we propose a basic smart contract to visualize the potential benefits or difficulties of blockchain for the online commerce of second-hand books. Furthermore, we design a basic application for blockchain users that serves as a simple marketplace with a focus on privacy and reduced cost.

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