A shadowy thief haunts the Library of Doom. One by one, the villain is outsmarting all the Library’s ancient traps. Nothing can stop him. And what’s worse, the thief is heading towards the Library’s most amazing weapon . . . a gleaming blue gem that can transform its owner into anyone in the world! Can the Librarians stop the villain before it’s too late? Part of the Library of Doom: The Final Chapters - Express Edition series.