Sharpen your sluggish brain with 70 specially-commissioned puzzles and challenges devised by Baker Street's legendary detective.
These cunning puzzles have been grouped by their approximate difficulty but as a wise man once said, "All questions are hard if you don't know the answer, and easy if you do."
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Delivery, installations & returns
Free UK delivery on orders over £50
UK standard delivery: 3-5 working days - £4.95
International delivery: 7-10 working days, from £15.
We hope you will be delighted with your purchase, however if you change your mind you can return your order in its original condition, with proof of purchase, to one of our National Trust shops or via our online customer service centre and we will exchange or refund your order.
For more information see our delivery and returns page.