Scream of the Haunted Mask (Goosebumps Horrorland #4), 4

It's a whole new ride from master of fright and bestselling author R.L. Stine--with a story so fiendish that it can't be contained in just one book

What should Carly Beth be for Halloween this year? TERRIFIED Late at night, an ugly green mask is mysteriously calling out to her, and ugly green masks don't like to be ignored. If Carly Beth survives the night, even a scary theme park might sound like a vacation. Or maybe not At HorrorLand, every night is Halloween. And those monster masks? They aren't masks.