The 2023 Edinburgh Book Festival features a lively lineup of authors and personalities from the mystery, crime, and thrillers genres. Catch Ragnar Jonasson and Katrin Jakobsdottir in conversation with Val McDermid. Mark Billingham and Doug Johnstone will talk about their work with Kezia Dugdale. And Ambrose Parry will lead a discussion of the thrill of the unexpected. To see the complete programme or to purchase tickets, go to the festival website.