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All you need to know about making and breaking codes.
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A fantasy thriller for 9 to 12 year olds. This is the third book in The Spirit of the Dragon trilogy. Huw finds himself back in time in the year 590 AD but trav
Codes and Ciphers
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All you need to know about making and breaking codes.
Collins Gem Webster's Dictionary
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A completely new full-colour edition of the popular guide to science