The skies are anything but friendly when Emily and Alexander discover a plot to sabotage a zeppelin.
Someone has drawn a mustache on the Mona Lisa! Emily and Alexander search the Louvre Museum for clues to find the dirty rat who is defacing priceless works of art!
All aboard for a high-class mystery as Emily and Alexander try to discover who is stealing jewels from the passengers aboard the famed Orient Express train.
Is there a ghost on the loose in the Tower of London? That's what Emily and Alexander are afraid of when a diamond is stolen from Queen Victoria's crown.