Tug of War — Barbara Cleverly

Joe Sandilands is back and headed to France where he's scheduled to stay as the guest of a glamourous French war window on her estate. The widow needs Joe's help to support her claim that a shell-shocked soldier suffering from amnesia is actually her husband. The problem is that four other men have identified this soldier differently. As Joe investigates all the claims, he uncovers a cleverly concealed murder committed during the war years. This discovery presents him with an even grater dilemma -- he must not only solve a killing in the past, but avert a tragedy in the future.