Through his operas, his symphonies, his compositions for his own ensemble, and his wide-ranging collaborations with artists ranging from Twyla Tharp to Allen Ginsberg, Woody Allen to David Bowie, Philip Glass has had an extraordinary and unprecedented impact upon the musical and intellectual life of his times. The operas - Einstein on the Beach, Satyagraha, and Akhnaten among many others - play throughout the world's leading houses, and rarely to an empty seat. Glass has written music for experimental theater and for Academy Award-winning motion pictures. Glass is the first composer to win a wide, multi-generational audience in the opera house, the concert hall, the dance world, in film and in popular music - simultaneously. Much of his early work was based on the extended reiteration of brief, elegant melodic fragments that wove in and out of an aural tapestry. Or, to put it another way, it immersed a listener in a sort of sonic weather that twists, turns, surrounds, develops. In the past 30 years, Glass has composed more than twenty-five operas, large and small; twelve symphonies; three piano concertos and concertos for violin, piano, timpani, and saxophone quartet and orchestra; soundtracks to films ranging from new scores for the stylized classics of Jean Cocteau to Errol Morris's documentary about former defense secretary Robert McNamara; string quartets; a growing body of work for solo piano and organ. Essential is available as a limited edition of 1500 individually numbered copies on crystal clear vinyl. The 4LP is housed in a deluxe 10mm slipcase sleeve and includes a 4-page booklet.