The third DI Tom Janssen mystery to be released in just over half a year, “Kill Our Sins” is another solid slab of entertainment perfect for lockdown times. When fisherman retrieve a badly mutilated female body off the Norfolk Coast, Jannsen, the stolid, relentlessly analytical homicide detective, aided by his offsider and by his boss Tamara, sets out to plumb the past and put justice to rights. All clues point to long-ago school friends but the plot is murky enough to almost derail Janssen. As ever, Dalgliesh keeps up a steady clip and the plot bucks and twists. Norfolk is a wonderful backdrop. A fine, complex read.