- WorldTourismDirectory.com, 2012 shifted to Tourism Net Trading Ltd., London, United Kingdom
- WorldTourismDirectory.com + Laenderkontakte.de, 2010 shifted to Dynamic Works GmbH, Meinerzhagen, Germany
- WorldTourismDirectory.com + Laenderkontakte.de, 2009 shifted to business-travel.de, Düsseldorf, Germany
- WorldTourismDirectory.com + Laenderkontakte.de, 2006 shifted to Columbus Webservice GbR, Jülich + business-travel.de, Düsseldorf, Germany
- WorldTourismDirectory.com, launched 2005, published with Dynamic Works GmbH, Cologne, Germaly
- Laenderkontakte.de – Directory of German International Relations, launched 2004, published with Dynamic Works GmbH, Cologne, Germany
- Africa Travel & Tourism, 2004 World of Information, Saffron Walden, Essex, United Kingdom, in conjunction with the World Travel & Tourism Council and various African tourism organizations and associations.
- WorldTravelTourism.com, launched August 2002. World of Information, Saffron Walden, Essex, United Kingdom, in conjunction with the World Travel & Tourism Council (WTTC), London, United Kingdom and endorsed by several international and regional tourism organizations (to be mentioned with the website).
- World Travel & Tourism – Africa, 2001 World of Information, Saffron Walden, Essex, United Kingdom, in conjunction with the World Travel & Tourism Council (WTTC), London, United Kingdom
- TourAdress + World Tourism Directory Online, co-published by TII Community GmbH, available with Travel24.com by June 2001.
- World Tourism Directory (3 volumes), 1999 K.G. Saur Verlag GmbH & Co. KG, Munich, Germany, in association with the World Tourism Organization (WTO), Madrid, Spain and the World Travel & Tourism Council (WTTC), London, United Kingdom
- Adressbuch für Auslandsreisen (paperback, consumer oriented) W. Richter Verlag, Munich, Germany
- Handbuch für deutsch-internationale Beziehungen, (3 volumes), 1997 (Handbook of German-International Relations) K.G. Saur Verlag GmbH & Co. KG, Munich, Germany, in association with the Institute of Foreign Relations, Stuttgart, Germany, and the German overseas TV and broadcasting service Deutsche Welle, Cologne.
- World Tourism Directory (3 volumes), 1996 K.G. Saur Verlag GmbH & Co. KG, Munich, Germany, in association with the World Tourism Organization (WTO), Madrid, Spain
- Handbuch für deutsch-internationale Beziehungen, 1994 (Handbook of German-International Relations) K.G. Saur Verlag GmbH & Co. KG, Munich, Germany, in association with the Institute of Foreign Relations, Stuttgart, Germany
- Worldwide Travel Information Contact Book 1993/1994 Gale Research, Inc., Detroit, USA
- Worldwide Travel Information Contact Book 1991/1992 Gale Research, Inc., Detroit, USA
- Weekly travel news page with the German magazine „Der Kassenarzt“ (1989/1990).
- Series „Reiseziele, die nicht jeder kennt“ (travel destinations, not known by everyone) with the German travel magazine (consumer) „Reisefieber“. (Country reports on Albania, Belize, Cambodia, Cape Verde, Laos, Mongolia, Nauru, Vietnam.)
- 1986/1987 Reports on: Andorra, Nauru, Northern Ireland, Val de Baztan/Basque Country
- Gift books: Ich schenke dir einen Baum, PiPaPro, Pilkowski’s Papier Produkte, Laubach-Freienseen, Germany, 1992
A Tree – From Me, Hill of Content Publishing, Melbourne, Australia, 1993
Ti regalo un albero, Campanotto Editore, Udine, Italy, 1995
