ACCIDENTALS HAPPEN is a diverse scale book which includes scales from classical, jazz, blues and a variety of world music traditions. In this book are 26 scales notated in all 15 key signatures. The scales in this book are: Major, Harmonic & Melodic Minor, Dorian, Phrygian, Lydian, Mixolydian (Dominant 7th), Aeolian (Natural Minor) & Locrian Modes, Major & Minor Pentatonic Scales, Spanish/Jewish, Hungarian Minor, Arabic, Hindu, Augmented, Lydian Augmented, Major & Minor Diminished, Whole Tone & Diminished Whole Tone, Harmonic Major, Blues, Bebop, Lydian Dominant & Chromatic scales. It includes reference material on 25 scales, the "Circle of Fifths," key signatures & enharmonic equivalents. Half steps are shown in all scales where applicable. Scales in this book for KEYBOARD are one octave notated in treble clef starting on middle C. Designed for basic keyboard and composers working at a keyboard. A great preparation for improvisation.