The Weird Zone Books in Order

Jeff and his friends follow their stolen street-hockey puck and discover giant alien moles beneath Grover's Mill. With friends captured and the town threatened, Jeff and Holly use a secret government invention in a race to stop the invasion.

Missing junk food in the school cellar seems like ordinary weirdness until a hungry prehistoric creature erupts beneath the cafeteria. Liz Duffey and her friends must find a way to stop it from consuming their school and everyone inside.

A mysterious purple light strikes Sean Vickers as he rides through Grover's Mill, and he begins shrinking rapidly. His sister Holly and friend Jeff investigate a suspicious toymaker before Sean disappears into the man's collection for good.

Liz, Holly, and Jeff arrive at their local lake to find alien zombies emerging from the water. The friends must stop the brain-hungry invaders and protect their town, especially when Holly becomes the monsters' next intended victim.

Jeff's beloved Cosmic Boy helmet becomes stuck to his head after a strange man blasts him with an X-ray. Discovering an alien's plan to control the world, Jeff must use his helmet's unexpected powers to oppose the threat.

Holly and Sean visit their father's horror-film studio to see its giant robotic octopus. The movie monster runs out of control under an alien's command, threatening to drag Grover's Mill into space unless the children can stop it.

A baseball game on the first day of summer vacation is interrupted when mysterious figures turn Grover's Mill into a jungle. Mike and his friends confront enormous Tiki heads whose ancient prophecy threatens the town with destruction.

Mike's experimental Potadio contraption is jolted into life and develops powers over other people's minds. When it begins controlling teachers and students, the children face a homemade invention with ambitions that extend far beyond their school and into world domination.