The Shangri-la Code — Fritz Galt

Visiting Paris with his lovely Chinese sweetheart, young American anthropologist Brad West must put his love life on hold to perform a vital national security mission. World leaders are disappearing in western China. But he's running against the clock because his girl won't marry him unless he solves the case by the end of the week. Then he learns that the American president is lost in the legendary region of Shangri-la. Armed with youthful enthusiasm and keen powers of deduction, he must steal his way into China and crack a code that can reveal the leaders' fate. But can he solve the mystery in time to meet his fiancee's deadline for marriage?