When Margaret and Casey see their father become weedy while working on his botany experiments, they worry that his plant-testing may not be entirely harmless.

Welcome to the Hall of Horrors, HorrorLand's Hall of Fame for the truly terrifying.

It's Halloween and Monica Anderson is out Trick-or-Treating with her younger brother. They knock on the door of an old, creepy house and are met by a strange woman who pleads for their help. Every year she must battle for the control of five sacred masks with the evil Dr. Screem. These artifacts have the power to manipulate the world around them. Monica doesn't...

Everything goes wrong for eleven-year-old Artie on his first day at Ardmore Middle School, from the moment his alarm goes off until the next morning, when everything is repeated exactly the same way.

Disgusted by his father's collection of tacky lawn decorations, which include pink flamingos and plastic skunks, Joe Burton is further upset when a pair of ugly lawn gnomes are added and a number of strange incidents occur.

A young girl purchases the most frighteningly lifelike Halloween mask and then, to her horror, discovers that she is unable to remove it from her face.

Matt Daniels battles a mysterious substance called Monster Blood that makes things grow, and then visits HorrorLand amusement park, where some of his friends disappear.

"Jay Gardener can't seem to stay out of trouble. Even after a fresh start in a new neighborhood, he keeps finding himself in bad situations. But it's not his fault! Jay wants to be a good kid, he really does, it's just these strange things keep happening to him. What kind of place did his family move to? And why does every house have so many lawn gnomes in their yard? Jay better learn quickly that there are things a lot more scary than his parents..."--P....

Billy and Sheena go with their Uncle, Dr. Deep, to search for treasure and are pursued by pirates who have been dead for two hundred years, and when Billy and Sheena return to land and visit Horrorland they encounter their worse fears.

"Billy and Sheena always expect adventure when they join their uncle, Dr. Deep, aboard his hi-tech boat. What they don't expect is a treasure hunt leading to a 200-year-old sea captain ... who refuses to stay dead! Just when they think the tide is turning, Billy and Sheena accidentally dive into a dangerous mystery. a chilling surprise awaits them in HorrorLand, the theme park where their worst nightmare is about to come to life"--Container.

On Halloween, Scott and Amanda plan to get revenge on their bullies by luring them into a supposedly haunted house filled with traps, but soon the house has plans of its own.