Franz Liszt - Carl Czerny - Theodor Leschetizky für Klavier oder Orgel-In this essential collection  John W. Schaum has distilled Czerny's well-known etudes down to short studies  using them to illuminate all 24 keys.  The resulting selection represents a broad cross-section of Czerny's works  giving the student the opportunity to profit from these varied technical studies while saving time and getting right to the heart of each exercise.