Phil Rickman lives on the Welsh border where he writes and presents the book programme Phil the Shelf on BBC Radio Wales. He is the author of seven previous Merrily Watkins' Mysteries, introducing the Reverend in The Wine of Angels, and charting her career as the diocesan exorcist with Midwinter of the Spirit, A Crown of Lights, The Cure of Souls, The Lamp of the Wicked, The Prayer of the Night Shepherd and The Smile of a Ghost.
Craig Russell is the author of the Jan Fabel thrillers set in contemporary Hamburg and the Lennox series set in 1950s Glasgow. He is the only non-German to have been awarded the Polizeistern (Police Star) by the Polizei Hamburg. He has been shortlisted for the CWA Duncan Lawrie Golden Dagger, the French Prix Polar, the 2012 Bloody Scotland Crime Book of the Year and the 2013 Ellis Peters Historical Dagger, and has won the CWA Dagger in the Library and the 2015 Bloody Scotland Crime Book of the Year