Gregory E. Lang is an American author known for his inspirational books. He gained popularity with his "Why A Daughter Needs A Dad" and "Why A Son Needs A Dad" series, which celebrate and explore the relationships between fathers and their children. Lang's work often delves into family dynamics, offering anecdotes, life lessons, and sentimental reflections intended to strengthen the bonds between family members. His books typically combine short narratives with photographs or illustrations, making them accessible and emotionally resonant for a wide audience.