A St. Louis book dealer buys a rare volume for $3,900, then is pleased to see his judgment rewarded when it is valued at $600,000. Just one small hitch: “The book may have been stolen from an unlikely victim — the German government. The state-owned Staatsgalerie in Stuttgart claims a World War II U.S. Army captain took the book and others from a castle and eventually deposited them in his Richmond Heights home.”