Blooming Guitarist.Intermediate Musician.well, here is a reference book of chord spellings with assisted charts and diagrams to help continue and further your analogy of chordal mathematics. Inside you will find spellings of chords and the nomenclature (title spelling) of the chord. No theory is involved, just flip through the chapters, scroll and scan, then apply it to your musical instrument or guitar and play. These chords are some of the most useful chords today. Hundreds and hundreds and hundreds of chord spellings with their respective formula are included inside.