From ISBN search engine, Amazon Book Standard Book Number can query book information and the best price of each publishing platform through ISBN books. Information about officially published and informally published physical books and e-books can be found through ISBN, including ISBN in Chinese mainland. More information such as author's name, edition, binding information, publishing house and publication date can be found than non-member users, and can be found without registered members. Books that are not officially published will not display picture information. The information on the distribution platform is limited to physical books, and e-books are not applicable.