http://www.jazztet.de/english/main/education/education.htm The Seven Secrets Of Jazz And Soul - by Eddie Landsberg http://www.geocities.com/onlinemusiclessons/ The Jazz Piano Book, The Jazz Theory Book - by Mark Levine Gesangsausbildung School of Natural Voice: http://www.keysnovello.com/school-natural-voice.htm http://www.keysnovello.com/select-vocal-coach.htm