The four-volume set Complete Recorded Works contains all the material slide guitarist Kokomo Arnold recorded during the '30s. Arnold was one of the most distinctive and influential blues singers of the decade, but his most essential material is compiled on Yazoo's single-disc Bottleneck Guitar of the '30s. That leaves this multi-disc set -- which is available in four separate volumes -- as the province of historians and completists. For those listeners, Complete Recorded Works is invaluable, featuring a wealth of rare, unreleased material, including several alternate takes. However, casual fans -- and listeners that have only a curiousity about solo acoustic blues -- will find that Yazoo's compilation is preferable.