Books move fast on mystery and thriller shelves, and many novelists will publish a book a year to keep up with demand. S.A. Cosby writes almost that fast, but luckily, his brilliant “King of Ashes,” which came out in 2025, has been recently released in paperback. In it, three siblings are brought together after their father is injured in a car accident, resulting in a coma. So, Roman comes home, Neveah keeps the family crematory going, and Dante, well, he hangs around partying.