Join the worlds greatest fictional detective and use your own powers of deduction to solve these puzzling mysteries. Sherlock Holmes Case Book: Solve-It-Yourself Mysteries is a remarkable collection of crimes from John Watsons case notes that features all of the twists and turns that have come to be expected from a Holmes case - but now it is up to you to solve them. There are 10 cases to be cracked, each of which requires the reader to use logic and powers of perception to answer a question at three points - the beginning, the middle and the end.