Two years (and two albums) later, the band — fueled by the fresh songwriting and six-string contributions of Tommy Shaw — was among the best-selling acts in America.

Styx recently revisited its platinum-selling one-two punch of 1977′s ‘The Grand Illusion’ and 1978′s ‘Pieces of Eight’ on tour, and Eagle Rock will release the sights and sounds from one show on Jan. 31.