Hallowed Out by Barbara Ross

For Julia Snowden of the Snowden Family Clambake, Halloween takes on a whole new meaning in the coastal town of Busman’s Harbor, Maine, when a seasonal activity turns fatal . . .
With its history of hauntings and ghost sightings, Busman’s Harbor is the perfect setting for Halloween festivities. Despite her busy schedule, Julia agrees to help out with a haunted house tour to protect her mother from overwhelming herself. But when a reenactment of a Prohibition-era gangster’s murder ends with a literal bang and a dead actor from New Jersey, Julia Snowden must identify a killer before she ends up sleeping with the fishes.