Karlos,
My triple row is I in GCF which I borrowed for the purposes of learning. Ultimately I'll be choosing an instrument to suit my vocal range which is usually in D. The book illustrates scales in A,A#,B,E,C,C#,D,D#,F,F#,G, andG#. Also included are progressions in thirds and sixths and all the chord shapes. A good place to start I think.
Charlie