In the story holes by Louis Sachar how does the author increase the reader's fear of the warden?

The author increases the reader's fear of the warden by showing her unpredictable and violent behavior, such as carrying a deadly rattlesnake around her neck and having a reputation for cruelty towards the boys at Camp Green Lake. Additionally, the warden's power and control over the camp and the boys, as well as the mystery surrounding her family's history and the secret she is trying to protect, also contribute to the fear she evokes in the reader.