An adventurous arrangement with unusual harmonies and counterpoint gives a lot of color to this great tune by Toots Thielmans. his vocalise treatment. From here he branches into Isotonic exercises, flexibilities, reliability, staccato, a big section on scales and Reiche scales (scale patterns taken from Gottfried Rei che's famous Fanfare) in all keys. Interval studies in which he expands on Arban's models, arpeggios, and descending scale exercises complete this book. Every bit of it is potent, challenging and rewarding.