The Haunted Cave is the third novel in the Spooksville series.
- This novel marks the first appearance of the Hyeets, an ape-like creature said to be the missing link between apes and humans. It also introduces Mrs. Robinson, an elderly agoraphobe.
- Locations mentioned in this novel include the Frozen Cow, Fred's Foods, and, accordingly, the Haunted Cave.
- the story takes place in a small town peolpe call spooksville