Bischoff Verlag Orgelschule Friedhelm Deis 1, Orgelschule Band 1, By Friedhelm Dies: Method for organ, Playing with the manual, For beginners, Direct approach to playing the organ, Exact fingerings, Explanations on elementary musical theory, Explanations on the construction and function of an organ, Musical dictionary, Audio examples to many exercises on CD, ISBN 9783920104058, In German language