This book attempts to uncover the basic ("Vanilla") chord changes to over 400 of the most commonly played jazz "standards".There are many good books that show how to use chord substitutions, but if the basic chord changes are not known, substitutions and embellishments often confuse the improviser and the listener.Embellishments to basic chords such as added 6ths, 9ths, 13ths, flat 5ths etc. are usually determined by the melody notes and the style of music being played.
Chord substitutions are influenced by the style of jazz being played and the individual preference of the musicians.