Mozart wrote one complete sonata for two pianos, the famous D major, here in a superb performance. But he also left sketches of a second work in B flat, which has been completed and realized by Anthony Goldstone. Together with Goldstone's transcription of the Adagio and Rondo, originally written for glass harmonica, and arrangements by Busoni and Grieg, this is perhaps one of the most fascinating and unusual programs of Mozart available.