Have you ever wondered how musicians know exactly which notes to play or sing? Long before modern music existed, singers had to memorize every single song by ear, which was incredibly difficult! Travel back in time to medieval Italy and meet a clever monk named Guido d'Arezzo. Guido loved music more than anything, but he was frustrated that melodies were so hard to teach and remember. You will discover how his brilliant, creative mind solved this massive problem by inventing a completely new system for writing down music. By giving each note a special name—starting with Do, Re, and Mi—Guido changed the world of music forever! This fascinating, beautifully illustrated true story reveals the history behind the musical scale we still use today. Get ready to explore the powerful magic of the very first notes ever written down!