The hunt for the 39 Clues is on - and the evidence contained in the 39 Clues cards is the best way for avid searchers to get ahead!\ JOIN ANYTIME TO PLAY FOR THE CHANCE TO WIN!\ Harry Houdini. A poison injector ring. Alcatraz. Mary Shelley's Frankenstein. What can they possibly have in common? Amy and Dan don't know, but fans of the 39 Clues series will soon find out.\ The first Cahill card series features 55 thoroughly intriguing evidence cards that kids need to hunt down the 39 Clues. The...