Keller Williams has been called guitar’s mad-scientist, a one-man band for the new millennium, and dozens of other clever sobriquets dreamed up by fans and music journalists trying to get a handle on his uplifting and ever-shifting style of music. Though Keller’s music has evolved since he first started playing music over twenty years ago, some things have remained constant: Keller is a prolific artist, an exceptional guitarist, and anaccomplished songwriter.