Fleetwood Mac's second album captures the British blues band before their transformation into pop-rock superstars. Released in 1968, "Mr. Wonderful" showcases Peter Green's guitar mastery and the band's deep blues foundations. Green's playing is both technically impressive and emotionally powerful, drawing from American blues traditions while maintaining distinctive voice. The album features Christine Perfect (later McVie) on keyboards and vocals, adding dimension to the blues framework. The band covers classic blues alongside original compositions demonstrating their understanding of the form. This is essential British blues documenting Fleetwood Mac's original identity before lineup changes would completely transform their sound and commercial trajectory.