Mystery novel by John Seldon "Murder in the Primary", paperback

Mystery novel by John Seldon, OACETT member: "Walter’s day was off to a bad start ... Walter Stillwell, superintendent of the Port Talbot Water Resource Recovery Facility, was a methodical man. Each weekday he got up at 6:30 a.m., recorded his blood pressure and heart rate, and prepared his breakfast, carefully measuring out 15 milliliters of homemade dressing for his modest salad of leaf lettuce and baking a serving of protein—usually a pork chop or chicken breast—in the toaster oven. Then, after watching a few minutes of the morning news, he dressed and left for work"