20 Melodic Studies, Op. 88 by Giuseppe Gariboldi is a series of 20 pleasant studies arranged for Flute.
Quite challenging and with many nuances, 20 Melodic Studies, Op. 88 would fit intermediate/advanced players and fill them with enjoyment while developing their learning and techniques.
Giuseppe Gariboldi (1833-1905) is an Italian flautist and composer who wrote numerous pieces for Flute. Most of his study books are still used to teach the Flute, including also 'Dainty studies, Op. 131' or 'Daily exercises, Op. 89'.