Join the world's greatest fictional detective and use your own powers of deduction to solve these puzzling mysteries. Sherlock Holmes Case Book is a remarkable collection of crimes from John Watson's case notes that features all of the twists and turns that have come to be expected from a Holmes case ydash; but now it is up to you to solve them. There are 15 cases to be cracked, each of which requires the reader to use logic and powers of perception to answer a question at three points rdash; the beginning, the middle and the end.