Frank and Jack is a music duo known for their eclectic mix of blues, rock, and folk music. The two members, Frank Thompson and Jack Harrison, have distinctive vocal harmonies and intricate guitar work that have become their signature sound. They rose to prominence in the late 1990s and have released influential albums such as "Riverside Blues" and "Midnight Highway". Their music, often characterized by its raw emotion and storytelling, has significantly influenced the contemporary folk rock scene.