The opus 21 of Carl Joachim Andersen is one of the best of his 8 volumes of Etudes for Flute. Difficult but necessary to become a professional in the art of flute, this is a reprint of the original authoritative plates of August Cranz, circa 1886, Plate A.C. 36842. Excellent edition, as with all Fleury Publications, blank staff paper and notes section for teacher annotations are present. First edition 2014.