In response to Ellory, best-selling authors including Ian Rankin, Val McDermid and Lee Child condemned "fraudulent" writers caught praising their own work on Amazon.
BBC: NI crime writers Stuart Neville and Sam Millar clash
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Their success mirrors that of so-called "Tartan noir" writers like Ian Rankin, Val McDermid, Christopher Brookmyre and William McIlvanney, who have also used the detective genre to explore social themes.
BBC: How Scandinavian is Scotland?
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The attack killed the British Army captain, John McDermid.