The Scream of the Haunted Mask is a novella written by R. L. Stine. It was first published in 2008 and was the fourth book in the Goosebumps HorrorLand book series.
Description[]
Menaced by the scream of the Haunted Mask, Carly Beth Caldwell starts to delve into its past - searching for a way to escape it. She uncovers a terrifying tale about an old stable she works near, but the mask isn't the only threat. At HorrorLand, she and her friend Sabrina team up with the other Very Special Guests, and overhear a disturbing plot to dispose of them all.