Piano concertos by Wolfgang Amadeus Mozart it was probably J.C. Bach, whom Mozart admired, who introduced the structural innovation of allowing the keyboard to introduce new thematic material in its first entry. Concertos Nos 1–4 (K. 37, 39, 40 and 41) are orchestral and keyboard arrangements of sonata movements by other composers. The next three concertos (K. 107/1, 2 and 3), which are not numbered, are arrangements of piano sonatas by J.C. Bach (Op 5. Nos. 2, 3, and 4, all composed by 1766). Based on handwriting analysis of the autographs they are believed to date from 1771–72. Concerto No. 5, K. 175 from 1773 was
Ketzel, the Cat who Composed Ketzel, the Cat who Composed Ketzel, the Cat who Composed is a children's picture book by Lesléa Newman. Based on a true story, it is about the friendship between Moshe Cotel and a kitten, Ketzel, who composes a musical piece that Cotel enters into a music competition and receives a special mention. "BookList" gave "Ketzel" a star review, wrote "this delightfully told story is unlikely and adorable in equal parts. Bates' watercolor, gouache, and pencil illustrations feature an unanthropomorphic kitty whose inquisitive and quizzical nature will be familiar to all cat owners." and found it "An absolute charmer!" and the