Sleeve notes are by Richard Williams and John Stevens and I have the feeling that one or both of these were main protagonists in persuading Chris Blackwell of Island to put it out. As it mentions in the sleeve this was ‘legendary’ in the UK as not domestically issued in the 1960s and Stevens mentions many musicians being aware of it through tape copies. I suspect that one of these might be Kenny Wheeler, who has acknowledged Booker as a major influence (you can hear it a mile off in this LP).
This was a ‘one off’ at the time, I don’t recall Island following up with others. Essentially driven by the Booker Little UK fanbase and widely issued e,g, you could pick it up in WH Smiths I recall ! (they probably thought it was along the lines on Peter Tosh, U Roy etc. ).
Island did put out the very occasional jazz LP. Harold McNair ‘Affectionate Fink’ comes to mind, a very rare LP.
All in all, the quartet set always struck me as a stunning release.