Have been using the amazon.de search via "ISBN" for a long time. Today I wanted to add two books to my collection, but it would not show any result. The books do exist, because I ordered them from Amazon (ISBN 978-3-89908-646-1 and 978-3-95839-463-6). I have also tried searching by title but no success. I logged into the aws management console, it shows accessing the api, so the credentials are ok. I assume the result returned by amazon.de do not get processed somehow.
*** This bug has been marked as a duplicate of bug 364784 ***