<https://lynnedavis.com/product/harmony-hill-for-bass-guitar/>
<http://schema.org/description>
"A complete 6 page audio-enhanced .PDF on the subject of understanding chords in progression for bass guitarists. Learn the most likely order in which chords change in music, and how to predict which chord is coming next in almost any song! Includes 6 musical notation examples, 6 customized play-along tracks and 1 detailed lesson plan showing you step-by-step how to practice and gain the most from the material."
<https://lynnedavis.com/product/harmony-hill-for-bass-guitar/>