With his ‘Nigeria’ album, guitarist Grant Green turned in pitch-perfect hard bop performances that risked confusing his growing fanbase.As both a leader and sideman, Grant Green was undoubtedly the most prolific recording artist on Blue Note’s roster between the years 1961 and 1964, having appeared on 50 different sessions for the New York label during a supremely fertile four-year period. In 1962 alone, when he recorded the tracks for what became Nigeria, he led five more studio dates, which would yield the albums Oleo, Born To Be Blue, The Latin Bit, Goin’ West, and Feelin’ The Spirit. The St. Louis-born...