This two disc edition of the band's debut features the original mono version plus the original 1966 stereo mix in the intended running order. The latter is different to the alternative stereo version used on Sign of the Three Eyed Men. The set also includes five unreleased mixes which are producer / engineer Bob Sullivan's original stereo studio mixes. The recordings were remastered and remixed from the original tapes in 2007 by the original producer Walt Andrus.