(Guitar Educational). Quick what's that chord? This compact reference guide includes: over 2, 700 guitar chord diagrams in all 12 keys; 58 chord qualities and four voicings for each chord; instructions on reading chord diagrams; and music theory to aid in chord construction. Measuring just 4 x 6 inches, this info-packed volume is small enough to take everywhere! | Hal Leonard Pocket Guitar Chord Dictionary, Paperback | Indigo Chapters