One of three Donald Byrd albums from 1967 (the end of his hard bop period), this recording features the trumpeter/leader with altoist Sonny Red, tenor saxophonist Hank Mobley, pianist Cedar Walton, bassist Walter Booker, and drummer Billy Higgins. The six tunes (five of which are originals by Byrd or Red) are all quite obscure and to one extent or another quite explorative. One can sense that Byrd wanted to break through the boundaries and rules of hard bop but had not yet decided on his future directions. The music does swing and highlights include "West of the Pecos" and "Beale Street"; Byrd and Red in particular are in excellent form throughout the date.

This album marked a continued maturing of both PFM's style and their presence in the Anglophone market. It benefits from Premoli's high-speed Hammond organ and synth runs on such all-out prog assaults as the conclusion of "From Under," as well as Mussida's gentle acoustic guitar lines on slower numbers like "Harlequin." The reissue of Chocolate Kings contains a bonus disc with several songs from previous releases, next to the material of Chocolate Kings. The recordings from a gig at the University of Nothingham, May 1st 1976 contains live versions of Four Holes In The Ground, Mr. Nine Till Five and Alta Loma Five’Till Nine/William Tell Overture.