This is the revised version of a lesson I'd posted previously here on the Ramp. I came up with this particular lesson - geared for songwriters who use the guitar when writing - to give them a "reference" tool of sorts which shows all the chords available to them in the five "guitar friendly" keys of C-A-G-E and D. Chances are, if you're looking for that cool "elusive" chord to use, it'll be here. I've provided a table for each key, showing all the different chords that can be derived from the notes found in that key. On the last few pages, I've also provided guitar chord diagrams for all of the chords, broken down by chord "type" - Major, Minor and Dominant. Some of these chords can really add a lot of "color" to your chord progression, turning an otherwise "bland" progression into something a lot more exciting.