Don Wildman investigates an American president’s cross-country road trip, a criminal crusader, and the secrets of a Grand Canyon adventure. S/6/13, Don Wildman investigates a president’s cross-country road trip; a detective’s plan to cut down on crime; and an explorer’s dangerous quest to be the first to uncover the secrets of the Grand Canyon., Don Wildman investigates an American president’s cross-country road trip, a criminal crusader, and the secrets of a Grand Canyon adventure.