The Killer Question by Janice Hallett

Married couple Sue and Mal Eastwood operated a pub in Hertfordshire called "The Case is Altered." They owned the establishment for two years before it closed. Now, five years later, their nephew Dominic is shopping the story of what happened to them to various media outlets as a true crime documentary.  The Killer Question lets the reader observe through text messages and other communications the lives of Sue and Mal when they owned the pub, especially the controversies that arose around the weekly trivia quiz they held on Monday nights. The situation gets even murkier when a body is found nearby.  Author Hallett keeps the reader on the edge of their seat with a really original story that takes many twists and turns. If you enjoy novels that have a really good puzzle, this book is a must read.