Who Was Jesus?
2009
Ancient Roads from Christ to Constantine
2015
Foundations: An Overview of Systematic Theology
1999
Atheism: A Rough History of Disbelief
2004
Des nouvelles de Dieu
2004
Jesus: The Evidence
1984
Bible's Buried Secrets
2011
Spurensuche – Die Weltreligionen auf dem Weg
1999
I grandi Papi
2018
Prayer and Reflection
2025
Secret Files of the Inquisition
2006
Le vrai pouvoir du Vatican
2010
