Adds a "Copy as JSON" Button to an audible book page.

• Copies the information about the book to the clipboard as JSON according to MAM upload schema.
• It will also take you to MAM Uploads page. If that does not happen, the copy has failed.
• Can guess MAM category from audible category.
• Length, Publishing information and full categories are captured into Tags and labels on MAM.

Demo of the button

Known bugs

• Does not work on new audible original pages (books where its fancier than shown in the above pic).