Goosebumps #11 The Haunted Mask 1993 Book with mask attached

Goosebumps #11 The Haunted Mask 1993 book.  Has the mask attached (photo 6). Condition: Some wear on the spine, especially the bottom and the corners of it. Noticeable yellowing on the pages. Crease on the bottom right of the front cover. Some minor wear on the goosebumps logo on the front cover.  Please see all photos.