Nathan Filer is congratulated by his wife Emily after winning the Costa Book Award
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Nathan Filer 'shocked' at Costa Book of the Year win

Nathan Filer has won the Costa Book of the Year with The Shock of the Fall, his debut novel about loss, guilt and mental illness.

The book follows the experience of Matthew Holmes, a 19-year-old who is haunted after witnessing his brother's death at a holiday park in Dorset.

Filer told the BBC's Rebecca Jones he was both "shocked and delighted" when his name was announced.

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