The album is made up of 15 tracks selected from a week-long engagement in June 1982, featuring Danny Wollinski on sax, guitarist Henry Johnson and Garrick King on the drums. Stylistically, Jack and his group cover a lot of ground, especially for an organ quartet - from beautifully old school funky, gritty blues with tracks like 'Walkin' the Dog' & 'Blues 1 & 8', jazz standards like 'April in Paris', and 'A Night in Tunisia' through to some frenetic and distinctly edgy fast paced jazz fusion type numbers - 'Make It Good' and 'Untitled D Minor' - and this reflects how Jack's ears were open to the newer, freer sounds that had developed in jazz and reflected in some of his recordings as 'The Heatin' System' - as several tracks have modal and fusion touches that sound remarkably current.