On volume 4 you'll get to learn about unknown bands (from out of the Jamaican scene like Los Creyentes de BC or studio ones like The Stars), get almost impossible to find tunes ('Rosario' or 'Los Coste?os') or listen to covers as good as the original (hurray for Los Robbin's!)... or with sounds that enrich the cover (those amazing Calypso touches of Ren? Santos or the cumbia flavour of Carmen Rivero). These precious stones are all different and all highly valuable -from Jamaican beat to early reggae or calypso- with covers that range not only from Jamaican scene classics to jazz and soul. And once again there's a ghost track at the end, from Panam? this time and giving an Antillean flavor to another Jamaican classic.