Only for comments about the content of the book:
Dr. Gerd Herold
D - 50737 Köln
Fax +49 221 9578400
Tax number: DE 122882462
Dr. Herold does not distribute the (e)book himself and can not provide technical support.
It is distributed by Lulu.com and a similar version of the e-book is distributed by DocCheck.com, so for any technical questions ask their support please.
Webmaster: Björn H. Gemein