8Did you know that natives of the Northwest used dried sharkskin to sand totem poles? Or that horses were called medicine dogs, because dogs had been used to aid in hunting before horses were introduced by Europeans? In "D is for Drum: A Native America Alphabet," readers will get an A-Z introduction to the many customs and cultures of the first people of this beautiful land. Bison, teepees, Kachinas and dugout canoes will all help to paint a fascinating picture of the more than 500 indigenous tribes inhabiting the Americas.