An incomplete revenge : a Maisie Dobbs novel by Jacqueline Winspear

Maisie goes to the country with the Beale family to pick hops and have a busman's holiday.  Her new boyfriend James Compton has asked her to check out a property that his company would like to buy.  She discovers that the local village has a guilty secret.  During the war, a Dutch family died when their bakery burned to the ground.  Why didn't the villagers help them? What does a caravan of Gypsies know about the secret? 306 pages.