Why do I need to enable ISBNDB?
In order to prevent developers from overloading their servers, the folks at isbndb put a daily limit on how many searches a single account can perform. If I released the app with my developer's account embedded, together we would all quickly overload my account's limit. Instead, I disable use of isbndb.com data by default and ask that you create your own free account before enabling the service. This ensures that all of us can use data from isbndb.com without running up against daily limits.