Schott Celloschule Vol.1: By Gabriel Koeppen, Cello spielen mit Spaß und Fantasie, A method for violoncello, For teenagers and adults, The basis for a sound technical and musical training, Pieces from Baroque,Classic,and Pop, Exercises on improvisation, Playing by heart, Transposition, Suggestions on varying melodies, Incl. CD with playbacks to a lot of pieces, In German language