Although there is considerable overlap in personnel between the two groups that feature on this double CD there is a marked difference in the aesthetic of each. The piano-less quartet sees the Parker-Brown-Drake unit joined by trumpeter Jalalu-Kalvert Nelson whereas the same aforementioned players form In Order To Survive with pianist Cooper-Moore. Roughly speaking, the first session, with Nelson, has a more overt blues base, with the Parker-Drake axis swinging and grooving to good effect on pieces in which the thematic content is strong. Parker's interest in rich, resonant choruses and hooks is by no means new but his dedication to hard-bop master Horace Silver makes that side of his personality abundantly clear. With Cooper-Moore in the band the performance sways very provocatively between serenity and turbulence, the climax of which is the aptly titled ‘Urban Disruption’, where the full extent of the pianist's harmonic and rhythmic daring comes to the fore, his lines deliciously splintering around the tonal centre of the music as the rest of the band delivers fragmented, fractious counterpoint. An accomplished addition to Parker's already voluminous discography.