* _The Gateway Tree_ (2010)
* _The Lost Boy of the Danube_ (2013)
* _The Palace Garden Mystery_ (2016)
* _The Last Waltz of Vienna_ (2018)
Non-fiction:
* _Vienna: City of Dreams_ (2008)
* _The Danube: A European Journey_ (2011)
* _The History of Vienna_ (2015)
* _The Art of Vienna_ (2017)