The graded readers series of original fiction, adapted fiction and factbooks especially written for teenagers. Twins, Andy and Mary, are in Dublin on a school trip. When Mary discovers that she has been given a forged €20 note, she thinks she knows the identity of the forger. The twins start to investigate, but it soon becomes clear that the forgers know who Andy and Mary are too. This paperback is in British English. It is also available with a CD-ROM/Audio CD with vocabulary games and complete text recordings from the book.