THREE SONATAS, Op. 21 by C.P.E. Bach (1714-1788) is here edited for solo piano by Hans Fischer and Fritz Oberdoerffer. The sonatas Included in this opus number are Sonata in A-major (Wq. 89, No. 3), Sonata in E-minor (Wq. 89, No. 5), and Sonata in C-major (Wq. 91, No. 4).