OPENISBN is a platform to allow users find book information, compare book prices, download/read free ebooks. If you are a publisher, author, or a reader, and you would like OPENISBN to access your book information or list your titles on our website, please contact us by email at: openisbn(at)gmail.com
If you are looking for open source ISBN databases, we recommend you to check ISBNPlus project's Open API at: http://isbnplus.org/api/.