Bill Laswell's "Sacred System: Book Of Exit / Dub Chamber 4" is a captivating blend of free jazz, dub, and avant-garde sounds, released on October 29, 2002, under the ROIR label. This 48-minute journey through experimental music showcases Laswell's prowess in crafting intricate, atmospheric soundscapes. The album features six tracks, each with its own unique character, from the haunting melodies of "Ethiopia" to the immersive textures of "The Lower Ground." Laswell's mastery of dub techniques and avant-garde compositions shines through, making this album a standout in his discography. Whether you're a fan of free jazz, dub, or avant-garde music, this album offers a rich and engaging listening experience.