Chord Progressions -- Theory and Practice: Everything You Need to Create and Use Chords in Every Key by Fox, Dan, Weissman, Dick published by Alfred Publishing
No matter what instrument you play, chords are an important part of your music. Chord Theory and Practice breaks down how they're important and gives you all the information you need to create chords and use them in your own music. Start off by learning how to build simple major chords and eventually move on to more complex chords such as ninth, eleventh, thirteenth, and altered chords. Also learn to compose your own progressions using techniques such as passing chords, neighbor chords, pedal tones, and voice leading. Finally, learn how chord progressions are used in various styles of music---from early jazz to the music of today. This book is ideal for pianists, but it can be used successfully by any musician familiar with the grand staff. After completing this book, you will have gained a clear understanding of chords and progressions in a variety of musical styles.
There is a lot of background before getting into the why.
Section 1. Chords Intervals and Scales (But it doesn't say why I want to know all those chords. 2. Creating Chord Progressions (Finally getting around to what is useful and not) 3. Chord Progressions in Different Styles 4. Chord Substitutions
I am marking this one as read since it is a library book in a far away county and I probably won't get back to it.