Wanderlust
2016
Bible Secrets Revealed
2013
Deadly Journeys of the Apostles
2015
Ancient Roads from Christ to Constantine
2015
Atheism: A Rough History of Disbelief
2004
Around the World in 80 Faiths
2009
Under His Command
2025
Heaven on Earth
2004
Extreme Pilgrim
2008
Extraordinary Rituals
2018
Hillsong: A Megachurch Exposed
2022
The Story of God
2005
New Testament History and Literature with Dale B. Martin
2009
Inside Scientology
2018
Compass
—
Christianity: The First 1000 Years
1998
Christianity: The Second Millennium
2000
Saints and Sinners: Britain's Millennium of Monasteries
2015
Religion of the World
2004
På tro og Are
2010