Luna, Mags, Scarlett, and Dakota (Scarlett's service dog) — aka the G.H.O.S.T Squad — are all about helping ghosts. In this episode, the school principal asks the girls to solve a mystery at the school-carnival fun house. This is typically the highest-grossing attraction at the carnival, but not this year. Something or someone is frightening away all of the children. The girls skip lunch, sneak into the fun house, and catch sight of the ghost! Assisted by Luna's psychic mother, they return to the fun house with a surefire plan to draw out the ghost and save the carnival. The plot may be shallow, but younger audiences will be taken by the enjoyable mix of feisty girl investigators, a smart dog, a ghost, and some simple exorcism. Each book in the Girls Hunting Oddities and Supernatural Things (G.H.O.S.T) series is independent and contains back matter about the paranormal, a "real-life" haunted place, further-research ideas, and an author Q&A. This is a nice stepping-stone for readers not quite ready for the ghostly volumes of the Magic Tree House series.
—Booklist, September 2017
