In Sherlock Holmes: The Challenge of Irene Adler, there is a new detective in town! Irene is now competing with the Baker Street boys for business. But will she truly be able to rival the skills of Sherlock? Play solo, or head to head against another player each taking on the role of either Sherlock Holmes or Irene Adler. Only by using your wits will you prove yourself to be London's Greatest Detective! Will you best your opponent in this battle of wits? Or will your opponent come out on top? Sherlock Holmes-themed interactive book from the Graphic Novel Adventures series. Solve mysteries and follow the trail of clues as Sherlock Holmes. Test your detective skills and unravel complex cases in this engaging book.