
"Mercy, Mercy, Mercy" is a song written by Joe Zawinul in 1966 for Julian "Cannonball" Adderley. It became a surprise hit. The tune has been re-recorded numerous times, most notably by The Buckinghams, who reached # 5 in August 1967, adding lyrics to the tune.
It is an interesting and challenging tune to arrange for solo fingerstyle guitar. There are two distinct melodic sections and a third section which is improvised around a blues riff. A fun arrangement to play and explore. Try to create variations on the theme as well as riff.