When a ghost disappears from a local house he was haunting, his sister in the OtherWorld spirit realm hires the Fantastic Phantasmic Detective Agency to find him. Eager to locate the missing ghost, the youthful sleuths, Abby, Toby and Billy, and their grumpy Medium Arthur Monsento jump right into the investigation.

The trail soon points to a mysterious spirit collector in the UnderWorld. In order to identify the culprit and put an end to his ghost-nappings, the agency must enter the UnderWorld, visit its secretive black market and search a tall dark tower in a desolate valley where danger lurks just around the corner. Can the young detectives and their Medium survive their latest case from the afterlife?

If you enjoy mystery and adventure like the Hardy Boys and Nancy Drew with a dash of Stranger Things, you'll love the latest installment of this paranormal detective series. Humorous and imaginative, these books are sure to entertain readers ages 12 and up.