C.P.E. Bach was a marvelous composer, and it's rather amazing to consider that until BIS began this estimable series, the vast majority of his more than 60 keyboard concertos remained unknown. In addition to the concertos, Bach wrote another very interesting series of works that he called "Sonatinas", which seem to be suites of movements for solo and orchestra in free form. The two included here, for example, consist of: first, an Andante ad arioso twice interrupted by keyboard solos, followed by an Allegro finale; and second, a Larghetto, Allegro, and a concluding Alla Polacca. Both are delightful miniatures.