Scandal breaks in the London press: There is a mole in the Intelligence Service! And it appears without a doubt, on a photograph taken by agents of MI 5, that the mole wears the face of Francis Blake! Mortimer is determined to believe that his friend has been forced to act against his will.

When some of the world's most amazing magicians start disappearing (and not in a magical way) Frank and Joe Hardy pit themselves against a trio of powerful young masters of illusion!

Nancy sets off to find a long-lost engine that gets 200 miles to the gallon. The problem arises when they encounter a ghost that guards the machine.

Have you ever had one of those moments? You know--you're trying to find a stolen diamond pencil box for your beautiful butterfly customer, your mosquito witness won't give you any information, and your clumsy scorpion assistant has just tampered with your only bit of evidence?Joey Fly has those moments a lot.

Video games can get too realistic as the flying teenager, GoGirl!, discovers in Prisoners of the machine when she and her friends find themselves trapped inside a computer, menaced by giant anime-robots! And in Double trouble , GoGirl!'s arch-enemies create a robot that looks just like her, except that it has the mind of a master criminal. How can our heroine convince the cops that she didn't rob that bank when everyone saw her do it? Plus, GoGirl!'s sidekick, Haseena, tired of always being rescued by the flying teen, takes up sleuthing herself in Haseena Ross, girl detective .