- Author: Robert Spencer
- Language: English
- Year: 2009
- Author: Robert Spencer
- Language: English
- Year: 2015
- Author: Daniel Ali, Robert Spencer, Mitch Pacwa
- Language: English
- Year: 2003
- Author: Robert Spencer
- Language: English
- Year: 2009
- Author: Robert Spencer and Anastasia Valassopoulos
- Language: English
- Year: 2021
- Author: Robert Spencer
- Language: English
- Year: 2021
- Author: John Zmirak, Elizabeth Scalia, Eric Metaxas, Peter Kreeft, Robert Spencer, Jimmy Akin, Dwight Longenecker, Eric Brende, George William Rutler, Donna Steichen, John W. Keck, Mark P. Shea, Jeffrey Tucker, John Zuhlsdorf
- Language: English
- Year: 2010
- Author: Robert Spencer
- Language: English
- Year: 2007
- Author: Daniel Ali, Robert Spencer, Mitch Pacwa
- Language: English
- Year: 2003
- Author: Robert Spencer
- Language: English
- Year: 2013