Dennis and Nan Allen have been writing Christian musicals, anthems, collections and dramatic productions for over 30 years. They have over 1200 music and drama projects published with multiple companies such as Lifeway Worship Music, Brentwood/Benson Music, Hal Leonard, and many others. Their music for adult choirs, student choirs and children's choirs has sold close to 3 million copies to date.

 They also own a self-publishing company, Allen House Productions, which produces a variety of product for the church and Christian schools. They have received multiple nominations and are 3-time winners of the GMA Dove Awards for Musical of the Year. Nan has also written three books, including two Christian fiction works and a study of Christian lyrics entitled "The Words We Sing." They lead workshops and clinics across the nation, specializing in the areas of worship, music ministry, youth choirs, and drama.