Echoes of Mercy — Lynette Hampton

Moments after Elva Kingfield placed flowers beside her late husband's tombstone, an explosion sent associate pastor Willa Hinshaw dodging chunks of hurling granite. Later, when Elva, who believes her dead husband's ghost is roaming the halls of her estate, falls mysteriously ill and her housekeeper is stabbed to death, Willa can't accept that the violence is simply random.

Upon discovering that someone is looting Elva's valuables, plus the strange behavior of the widow's feuding family members, Willa is convinced that somebody wants Elva dead. Determined to do whatever she can to keep the kind woman out of harm's way, she ignores ominous threats telling her to mind her own business...or else. Willa's got all the help she needs from Above -- it's the danger below that's got her worried.