Reviewers of The Dinner  by Paul Koch are comparing it to Gillian Flynn’s 2012 hit G0ne Girl. Paul Lohman and his  wife Claire meet another couple at a chic restaurant for dinner.  The conversation remains a gentle hum of polite discourse. But Paul knows that his 15-year-old son, Michel, has committed an unspeakable crime and that his brother, on the cusp of becoming the Netherlands’ next prime minister, shares Micchael’s Secret.