BLOOD SONG - Out now

Book three in the award-winning, critically acclaimed 'Roy & Castells' series, featuring true-crime writer Alexis Castells and profiler Emily Roy.

A terrific, original duo

Marcel Berlins, The Times

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Gustawsson's writing is so vivid, it is electrifying. Utterly compelling

Peter James

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A bold and intelligent read

The Guardian

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OPUS ROY & CASTELLS