While I haven't liked all of Mary Downing Hahn's books her ghost stories here are first wait. The first book in this box set is the tale of a 13 year old girl who mother and aunt always act strange when it come to the lake home they grew up. Especially refusing to talk about the girl cut out of the photo. After much pleading she finally get allowed to spend the summer at the lake house and baby sit her aunt's daughter. Then the girl meet a strange girl who always seen in a swim suit even in the rain and is looking for a forever friend. The questions are what is her secret and how forever does she consider forever.
The 2nd story deals with a widower with a little girl marrying a widow with a older son and daughter. After the family discover Helen's grave behind their new country home the widower's daughter want to spend all her time with her new ghost friend and gets her step siblings in nothing but trouble. Its a matter of saving their new sibling before Helen take things too far.
The final story deals with a pair of prankster trouble makers staying with their grandma's bed and breakfast inn for the summer which has a legend of being haunted. When the kids pretend to be ghosts they disturb the real ghosts haunting the place and the haunting become more scary and dangerous than the kids thought possible as they try to put the restless spirits back to sleep.