I’m immensely grateful (in various ways) to Craig Sisterson, Russell James, Mike Ripley, Ayo Onatade, Kim Newman, Katherine Armstrong, Bill Massey, Trisha Jackson, Alison Hennessey, Angus Cargill, David Shelley and Judith Forshaw. I’ve also kept the synapses in my brain firing through lively discussions with my fellow newspaper crime critics Jake Kerridge, Marcel Berlins, Laura Wilson and John Dugdale.