Etta the elephant receives an invitation to the Bicycle Bash from her aunt, who has a surprise waiting for Ella!

After Andres discovers a haunted bike park, he calls his best friend Desmond, a ghost investigator.

Ben rides his new bicycle the very, very long way to school but Adrian Underbite, perhaps the world's largest third-grader, takes the bike anyway and later, when Ben finds Adrian in trouble, he must decide whether or not to help the larcenous bully.

"A new mystery has rolled onto Penfurzy Island, and the Rebel Bicycle Club are ready to investigate! Nessa, Demelza, and their goose, Captain Honkers, are excited to explore a traveling carnival that's come to Penfurzy, and soon they befriend Jack, the son of the carnival owner. But strange things are happening too, like odd tremors that shake the island! Does it have anything to do with the fact that the carnival comes to Penfurzy only every ten...

When bicycles go missing at Fairville Elementary School, it is up to nine-year-old Kim Webster to listen to witnesses and evidence presented by her friends and settle the case in her treehouse court.