I am especially grateful to my daughter Julia who illustrated all my books including the covers, with the exception of the ‚Spielheft’ which was illustrated by Jens Koegel, to whom I extend my thanks as well as to Dieter Rosenberg who was my adviser in the vast field of music theory and technologoy.

I am also grateful to all my pupils who tried out and played my tunes and last but not least my thanks go to Abe Cytrynowski who helped with the arrangement of the English version of the text, and to my son Colin who created this website.