After 20 years working in Africa and collecting beads, I find this the best book of its type for people actually going into African markets, American bead shows, and flea markets looking to buy rare or collectible beads. It is not the right book for someone who doesn't yet know the basics about where and how the major types of beads are/were fabricated, how they have traveled, and the ethnographics associated with their past and present uses. (For those subjects, try Dubin, J. Allen, Liu, Picard, and Beckworth's Africa Adorned.) But for ballpark pricing, comparisons, and availability, there's nothing better in print.