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Cracking Codes(The Knowledge)
Format: Paperback
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First the ancient Greeks hid messages under their hair. Then Mary Queen of Scots completely lost her head because of a cracked code. Now computers create codes no human can crack. This revealing guide gives you the key to unlock the secret languages of spies. Get on the case to discover how to decipher dots aand dashes, fathom flags, and suss a simple cipher. Find out how codes shaped history, won wars nd could even help us talk to aliens. PLUS try your hand at code making and code-breaking. Will you crack under pressure?
Genre: Children's non-fiction, Games & Activities
Format: Paperback
Published: 2003
Pages: 158
Publisher: Hippo
ISBN: 9780439981842
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Condition Descriptions
Our conditions mean the following:
- New - a brand new book
- Almost New - appears new but is actually secondhand.
- Very Good - only minor imperfections such as minor scuffs to edge or cover or a price written in pencil or shop sticker.
- Standard Secondhand - Clearly been read before, but not too bad. We do not recommend these for gifting. Spines usually creased. Could also include creases or folds to cover, some writing such as in the cover or elsewhere, underlining or highlighting, but might not do. Possibly some stains or marks. Similar in general to books in any secondhand shop or charity shop.
- Poor Condition - Usually this will have a specific problem such as writing inside, water damage, missing dust jacket, heavy staining, large creases or cuts. These are readable copies but not nice ones. On other websites this condition is called 'Acceptable' or 'Fair' , but we want to be more honest.
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