The Mystery of the Mayhem Mansion — Matthew K. Manning

When Scooby-Doo and the Mystery Inc. gang visit a famous mansion once owned by horror filmmakers Jeffrey and Madeline Mayhew, they discover they've arrived at a pretty creepy place. With its maze-like layout, strange stairways that abruptly end at the ceiling, doors opening to reveal brick walls or two-story drop-offs, and multiple secret passageways, the mansion has become a top tourist attraction. But with reports of ghosts with glowing eyes scaring away tourists, the gang know they must investigate the mansion and find out exactly who or what is at the bottom of this. And they need your help!