Glass: GlassworksAmazon. com Glassworks remains Philip Glass's bestseller from the middle period of his career, the recording by means of which many listeners familiarized themselves with his music. Conceived as a thematically whole instrumental studio album taking advantage of the promotional and marketing capabilities of what was then Glass's new major label (CBS, now Sony Classical) and targeted at consumers intrigued with his newfound notoriety, Glassworks