21 books • 5 series
Book #2: Moosicology Lesson Two: Time Signature
Book #6: Moosicology Lesson Six: Note Value
Book #9: Moosicology Lesson Nine: Shuffle Note
Book #12: Moosicology Lesson Twelve: Major & Minor Key
Book #13: Moosicology Lesson Thirteen: Melody, Harmony & Chord
Book #1: Moosicology Lesson One: Introduction to Notes
Book #3: Moosicology Lesson Three: The 4/4 Time