Gregory Koukl

The Story of Reality Study Guide Plus Streaming Video: How the World Began, How It Ends, and Everything Important That Happens in Between - Gregory Koukl

Tactics Study Guide, Updated and Expanded: A Guide to Effectively Discussing Your Christian Convictions - Gregory Koukl

The Story of Reality Study Guide: How the World Began, How It Ends, and Everything Important That Happens in Between - Gregory Koukl

Tácticas: Un Plan de Acción Para Debatir Tus Convicciones Cristianas - Gregory Koukl

Street Smarts: Using Questions to Answer Christianity's Toughest Challenges - Gregory Koukl

Tactics, 10th Anniversary Edition - Gregory Koukl

The Story of Reality: How the World Began, How It Ends, and Everything Important That Happens in Between - Gregory Koukl