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, anything can happen.