This book introduces the basic concepts and terms needed to discuss melody and harmony. It is intended for teens or adults with no background in music theory but some familiarity with reading common notation and playing an instrument (or singing). Concepts covered include interval, major and minor keys and scales, triads and chords in addition to a review of common notation and an introduction to the physics behind music theory, as well as the basic concepts of music theory and a few slightly advanced but very useful topics, such as transposition.