Adults and Young Adults: First book in The Jansen Family Detective Series. A dollop of history, a smattering of humor, a baffling mystery, a wild adventure, and a thought-provoking presentation of the philosophic conflicts which were tearing the world apart in the 1940s, so comparisons can be made with those manifest today. A grandfather and his grandsons - 10 and 15 - find themselves fleeing the city to escape some unknown threat in 1940 America...