From the publisher:
Carry the hunt for Mr. Jack wherever you go with Mr. Jack: Pocket, an adaptation of the asymmetrical, two-player deduction game Mr. Jack! The famous detective Sherlock Holmes, his partner Watson, and their dog Toby have cornered Mr. Jack in a labyrinthine district of London. But once more, Mr. Jack has adopted a brilliant disguise. They must discover Jack's true identity in order to defeat this criminal mastermind, but Jack can evade capture by losing his pursuers in the darkened streets and wasting their time. This version contains all the deduction and trickery, maneuvering and misdirection of the original board game, but features new art by Jean-Marie Minguez and has been made perfectly portable.