自分の蔵書管理は『Delicious Library 3』を使っていたのですが、
v3.7でこのような残念なことに...。
Separately, Amazon Japan has decided to terminate their partner agreement with us, so we can no longer load item information from that store. We will continue to try to work with Amazon Japan to restore service. 引用https://itunes.apple.com/us/app/delicious-library-3/id635124250
いつか日本Amazonの扱いが復活するとよいのですが。