Incomplete Revenge, Paperback/Jacqueline Winspear

The 5th mystery in the Maisie Dobbs series, set in the 1930s in the Kent Weald. Maisie is hired to uncover a series of unsolved crimes in the village of Heronsdene; but the locals don't take kindly to outsiders and the legacy of a wartime Zepplin raid seems to point to a long buried secret.