Site greben.de and raderade.net is private site for selling a personal books.; It uses some service to regulate payment like Moneybookers.com
They have their privacy police.Moneybookers.com is one of the leader in the world as merchant and online paying.
2. Autor Rights
Author rights is protected by institution and nobody have rights to copy print and use this material without accordance of author.
3. You can order printed verion of the book in quantity of 100 or more trought this site.You can returne them , if thay are demaged without your fault.
For any other information , please contact me