This set does a great service to collectors by assembling 27 tracks from 1959-1966. While these are primarily wonderful blues/R&B crossover sides, there's plenty of variety. Though the style hopping is sometimes unsetting, it makes for a better listen overall. There are relatively straight blues among the earlier sides, and melds of blues and R&B with pop –occasionally with strings -- on covers of standards. Other tunes verge on out-and-out soul.