Tale hits a few false notes"The story of a music teacher and pupil raises questions it fails to explore in any great depth, writes Roger Stitson. WOULD you have enjoyed being taught by Herr Eduard Keller, the teacher-figure encountered by young Paul Crabbe, the central character of Peter Goldsworthy's novel, Maestro? Although the comparison is superficial, the portrait of Keller reminded me of Professor Julius Sumner Miller, who appeared in a TV science series titled Why Is It So? back in the 1960s ... "