A manual regrouping, in five chapters, the main theoretical parts of the expression of jazz music. Each chapter explores, in detail, an aspect of the theory of jazz and popular music, and includes several tables summarizing the concepts discussed. - Construction of agreements - Ranges and modes - Chord progressions - Analysis - Chord / scale relationships (improvisation elements) A reference book that will be useful for both experienced musicians and those seeking a first approach to the theoretical elements of jazz and popular music.