Enter the thrilling and entertaining world of Sherlock Holmes and pit your wits against the fiendish and ingenious challenges he sets in this collection. Join his friend Dr Watson in attempting to solve more than 130 unique and gripping puzzle vignettes. Some involve riddles, some plays on words, and some rely on mathematical principles. Use your powers of logical deduction, and see if you can match the towering intellect of Sherlock Holmes, the greatest detective of them all.