He also works as a free-lance author for magazines and web sites involved in history. He did not specialize so far in a specific subject in history, until he wrote the book ‘Malta, Island under siege’ in 2009. This book was also published in the Battleground Series. That series comprises over one hundred books about mainly the First and Second World War. The Battleground issues are always built up with double purpose. On the one side each issue is an informative book which provides the reader with more information about the subject. On the other hand it is at the same time a guide for a visit to the battle ground in which all kinds of places worth seeing can be found and with which the reader can plan his own battle field tour at the hand of various geographical maps and travel recommendations.