ISBN-13: 9781494868024 / Angielski / Miękka / 2014 / 32 str.
Three friends set out on a journey to discover the secrets of an old map that was found in their school library. Their curiosity and determination helps them to unlock the mysterious codes to a puzzle located in a very familiar spot-the school gymnasium. To their surprise, they find themselves fighting off the forces of evil in an underworld that is full of adventure and surprises. Will the "Chosen Ones" come out victorious?