The book is now listed on the German Amazon site (amazon.de) but not yet ready to order (on stock). This can take between 2-4 weeks and depends on Amazon.
In the meantime the book can also be ordered on the German publisher´s website:
The site is in German language but delivery is made worldwide. Payment can here be made either by PayPal or wire Transfer.
Using a language translator for the site should make it fairly easy to order. If you have difficulties, you can write to me or alternatively wait for Amazon to have it Ready.