In Scary Cat 4, Pipa and her friends explore a Spooky house. There are no supernatural threats. Rather, the air of mystery is what feeds the infantile fears of the characters. At first, Pipa's friends are hyper focused on a so called "Haunted Doll". The doll apparently has the ability to speak.
The initial investigations show the doll not doing anything. While investigating the doll, a bug lands close to Pipa's face. This triggers Pipa's bug phobia. So, she naturally runs deeper into the spooky house. The book then becomes a hide and seek game.
The readers and Pipa's friends are tasked with finding where Scary Cat is hiding. The book teaches children to use their powers of observation and to think critically. Just because someone tells you that a place is haunted by ghosts, you shouldn't believe them. Just because a doll can talk, one shouldn't imminently think ghosts are involved.
Talking dolls are real, and they talk because they have a robotic component that gives them the ability to speak. I hope you find Pipa's next Scary adventure amusing and humorous.
