Biff Brewster, sixteen, is a tall, strongly built blond youth who lives in Indianapolis, Indiana, with his parents and the eleven-year-old twins, Ted and Monica. Because his mother and father believe that travel is as important to education as formal schooling, Biff is encouraged to travel to various countries during the vacation months. His experiences in these lands, and the young people he meets there, form the basis of a new series for adventure-loving readers. In every journey there is a strong element of mystery, usually a direct result of conditions peculiar to the region in which he is traveling. Thus, in addition to adventure, these books impart carefully researched information about foreign countries.