Super-selling author Gordon Korman sends Amy and Dan off on a wild chase in Book 2 of the highly-anticipated 39 Clues series. THIS JUST IN! Amy and Dan Cahill were spotted on a train, hot on the trail of one of 39 Clues hidden around the world. BUT WAIT! Police report a break-in at an elite hotel, and the suspects ALSO sound suspiciously like Amy and Dan. UPDATE! Amy and Dan have been seen in a car ...no, in a speedboat chase ...and HOLD EVERYTHING! They're being chased by an angry mob?!? When there's a Clue on the line, ...