This chapter concentrates on harmonic extensions such as major and minor sevenths, ninths, and thirteenths. You will also learn about suspended chords, which are a staple in pop music. Last, you will learn about chromatic passing chords. These chords will add a jazzy flair to any I, IV, V blues. If you're looking to expand your harmonic horizons, read on. This chapter contains a whole host of colorful chords. As musicians would say, you'll learn about all the “hip changes” here.