Advance Music Das Groove Piano Buch – Über 100 Piano Grooves mit Audio-Tracks: book with over 100 grooves from various styles for accompaniment on the piano, by Philipp Moehrke, ISBN 9783954810277, ISMN 9790206302497, ADV 9024, 23 x 30.5 cm, 112 pages, incl. online audio with demo versions, in German language