API使用例
・楽天
https://app.rakuten.co.jp/services/api/BooksBook/Search/20170404?applicationId=xxxxx&isbn=9784591159224
・google
https://www.googleapis.com/books/v1/volumes?q=author:歌丸
https://www.googleapis.com/books/v1/volumes?q=title:激白新撰組
・openBD
https://api.openbd.jp/v1/get?isbn=9784591159224