Publisher: Balquhidder Music
Author: Rob Roy McGregor

This one contains patterns designed to lead the student through greater mastery of the scales from an intermediate level through college.

All the Major and Minor scales are covered in depth, through a variety of formats. Also Chromatic, Whole Tone, Pentatonic, Modes, some Augmented and Diminished patterns. Velocity and Range exercises round it out.
Also included is a reference table that shows each Major scale with its Relative Minors in their four forms and a "Circle of Keys" illustration that shows how the keys are related to each other.