A Talent for Life

In the village of Malham Bridge Barnaby and Troy have to solve a double murder when a feisty former socialite Isobel Hewitt and a local Casanova Dr Duncan Goff are found bludgeoned to death together by the nearby fishing river after Hewitt has been accused of assault by fellow fly-fisher Margaret Seagrove. However the motives for the murders seem disparate and there are several people who are suspected of involvement. Then one of the suspects is found dead in his restaurant's walk-in freezer - another murder or suicide and why?