Amazing Grace is a musical with music and lyrics by Christopher Smith and a book by Smith and Arthur Giron.The musical is Smith's first foray as a professional writer or composer.It is based loosely on the life of John Newton, an English slave trader who later became an Anglican priest and eventually an abolitionist. He wrote many hymns, including "Amazing Grace". 　　The musical had a 2012 production by Goodspeed Musicals in Connecticut and a pre-Broadway run in Chicago in 2014.It opened on Broadway on July 16, 2015 and closed on October 25, 2015.