Katie Harnett is an illustrator and author who is based in Sheffield. She illustrates picture books, book covers and older fiction.   

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She is represented by Andrea Morrison of Writers House.

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Picture books include Archie Snufflekins Oliver Valentine Cupcake Tiberius Cat, Ivy and the Lonely Raincloud, Monty and the Poodles, the Franklin's Flying Bookshops series, What Did The Good Night Monster Do? and Home is Where the Birds Sing.

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She has worked with publishers including Flying Eye Books, Thames & Hudson, Walker Books, Text Publishing, Chronicle Books, Beach Lane Books, Nosy Crow, Francis Lincoln and David Fickling Books.