French Horn Book 1 will introduce five-note major and minor scales in twelve different keys (C Major, A Minor, Bb Major, G Minor, A Major, B Minor, G Major, C Minor, B Major, D Minor, D Major, Bb Minor).

French Horn Book 2 will introduce five-note major and minor scales in twelve different keys (Eb Major, F# Minor, E Major, C# Minor, F# Major, Ab Major, E Minor, Db Major, C# Major, Gb Major, F Minor, F Major).

French Horn Book 3 will introduce five-note major and minor scales in twelve different keys (G Major, F# Minor, Cb Major, F# Major, G Minor, Eb Minor, Ab Minor, G# Minor, Gb Major, A# Minor, D# Minor).

French Horn Book 4 will introduce one-octave major and minor scales in ten different keys (C Major, A Minor, Bb Major, G Minor, G Major, D Major, B Minor, D Minor, E Minor, F Major).

French Horn Book 5 will introduce one-octave major and minor scales in ten different keys (Eb Major, A Major, C Minor, F# Minor, E Major, Ab Major, C# Minor, F Minor).

French Horn Book 6 will introduce one-octave major and minor scales in ten different keys (Db Major, B Major, Bb Minor, Gb Major, F# Major, Eb Minor, F# Minor).

French Horn Book 7 will introduce one-octave major and minor scales in ten different keys (Gb Major, Cb Major, Ab Minor, G# Minor, D# Minor, C# Major, A# Minor, G Minor, G Major).