This is Book 1 of a series of Abby & Holly books. These two girls were first introduced in Book 5 of the Davey & Derek Junior Detectives Series.The girls are first cousins on their mothers' side. They moved to the quiet town of Lindon, New Hampshire and live in a grand old Victorian which is haunted. The cousins are excited about attending the 6th grade dance. When their friend, Justine, is bullied, Abby and Holly, along with the help of a ghost and Davey & Derek, work together to formalize a plan to put a stop to the bullying.