Alice and her brother Louie meet Johnny Boyd when they spend summer vacation with their grandparents on the farm. Louie thinks he saw a ghost and the three children are out to solve the mystery.
When his neighbor Mrs. Sugarman reports seeing a seven-foot tall monster resembling Big Foot in New York City's Central Park, Cody Smith and his friend Maria Romero set out to investigate the sighting.
When someone breaks into Coach Taylor's office and steals the money for the new basketball uniforms but leaves a set of footprints behind, its up to Kevin Anderson to solve the crime and expose the thief.
When Cody, his mom, and his friend Maria arrive in the Florida Keys to house-sit for their friend Sally West, they are warned about a kidnapper at large in the neighborhood who tried to abduct young Angela Gomez.
"I walked across the room and opened the small door. The sound stopped as I peered in. All I could see were some old magazines and a book. As I watched, the book moved! I was scared and wanted to run, but my feet seemed nailed to the floor. I finally reached out and picked up the book and blew dust from it. I felt someone or something next to me once more."
During his summer in Hawaii, Kimo repeatedly visits a secret and forbidden beach, ignoring several frightening warning signs. Who is threatening him and why?
Two boys harassed by a group of rowdy kids at school get their revenge when they stumble into the school custodian's cleaning closet and find something very unusual.