If the bazillion packagings and repackagings of Mahalia Jackson's music confound you and you don't know where to start, this expertly compiled, carefully annotated double-disc box set is for you. Jackson wasn't just gospel music's first international superstar--she was among its earliest adherents and inventors. Working with the great composer and former blues singer Thomas A. Dorsey in the late 1930s, Jackson gave a distinctly blues-trained, jazzy sass and grace to Dorsey's material and the other hymns and spirituals she sang. More than any other performer, she helped to define gospel music itself as a transcendent, rootsy, melismatic, and heady spiritual sound. Culled from her sides for Columbia in the 1950s and 1960s, some of the arrangements in the set are not ideal and may sound quite a bit dated, but that voice shines and soars and dives straight to the center of your heart. Whether backed by a simple organ or piano or with full studio accompaniment, Jackson's booming, instantly recognizable contralto is indescribable, exciting, and forever a wonder to behold. And if you think that's an exaggeration, you don't own this record. --Mike McGonigal