The study examines the published music of Keith Emerson (b.1944) and includes solo piano transcriptions of thirteen of his compositions. Emersons music was published on three continents over a period of thirty years (1975-2005). Because almost all of it is currently out of print, a need exists for a cataloguing and a rediscovery of his music. The work is in five chapters. The first, a short biography, examines Emerson as a composer. The second addresses the importance of Emersons music. The third covers the sources of Emersons published compositions and a performance and recording history of Emersons music performed by pianists other than the composer. The fourth chapter surveys thirteen compositions which appear as solo piano transcriptions in the fifth chapter.