Flute's up Book
The Flute Scales! Vol. 3 by Roberto Alvarez:

Scales method to explore all the range of the Flute, going from the low register to the top D. It includes Major, Harmonic, Melodic, Pentatonic, Whole tone, Chromatic scales and all kind of arpeggios: Major, Minor, Diminished 7th, Dominant 7th, Augmented, etc.

SGD$25
plus the cost of mailing