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Ideal for children aged 7+ (KS2), this fun-filled addition and subtraction-themed maths puzzle book allows children to test their numeracy skills again and again, with a built-in ´reveal the answers´ feature that uses a moiré device.

Ideal for children aged 7 to 11 (KS2), this fun-filled addition and subtraction-themed puzzle book allows children to test their numeracy skills again and again, with a built-in ´reveal the answers´ feature that uses a moiré device.

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Sherlock Bones and Dr. Catson are entangled in an arithmetic adventure. They must follow a teasing trail of addition and subtraction-themed maths puzzles, and it´s up to the reader to solve each sum, all in the hope of foiling Professor Moriratty´s evil plan.

This charming maths activity book features ´Sherlock´s Secret Solver´ magnifying glass which reveals the answer to each puzzle when placed over a moiré area, allowing children to test their numeracy skills again and again.

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An excellent book which covers part of the number element of the KS2 curriculum in a lively and entertaining way Parents in Touch

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Bigwood, John
John Bigwood is an illustrator and graphic designer based in London. He has worked across a range of genres for children and adults, such as the best-selling Sherlock Bones series and How to Draw People for the Artistically Anxious.

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