Investigator Isaac Bell is on the trail of a ruthless espionage agent . . .On the ocean liner Mauretania, two European scientists with a dramatic new invention are barely rescued from abduction by the Van Dorn Detective Agency's intrepid chief investigator, Isaac Bell. Unfortunately, they are not so lucky the second time. The thugs attack again - and this time one of the scientists dies. What a…
Summary: It's 1910. Air travel is still in its infancy, and newspaper publisher Preston Whiteway is offering $50,000 for the first aviator to cross America in less than 50 days. He is even sponsoring one of the prime candidates - a heroic woman named Josephine Frost - and that's where Isaac, chief investigator for the Van Dorn Detective Agency, comes in. Josephine's husband, Harry, has just mur…