Twelve-year-old Harvey and his bossy cousin Nora get involved with counterfeiters, imposters, and a pet raccoon when they find a prowler outside the house one night.
Thirteen-year-old Rachel and her cousin Charlie become linked with the mad ghost of a fierce old lady, who is eerily involved in the upcoming Sunbonnet Queen contest about which Rachel dreams.
Phoney Bone rigs the Spring Fair's annual Great Cow Race by putting Smiley in a bovine disguise and convincing everyone to bet their livestock on the mystery cow, and Fone Bone finds himself in a one-cousin battle with the rat creatures.
When Ted and Kat's cousin Salim disappears from the London Eye ferris wheel, the two siblings must work together--Ted with his brain that is "wired differently" and impatient Kat--to try to solve the mystery of what happened to Salim.
Fone Bone and Smiley return a lost rat creature cub to the mountains and discover Rock Jaw, a giant mountain lion whose big ambitions bring him face-to-face with monstrous competition.
When thirteen-year-old Ali spends the summer with her aunt and cousin at the family's vacation home, she stumbles upon a secret that her mother and aunt have been hiding for over thirty years.
Lucius, Smiley and Phoney are attacked by rat creatures in the forest, barely making it to Lucius' tavern, while, at the farm, Fone Bone and Thorn are having strange dreams and Gran'ma Ben suddenly begins revealing secrets and new dangers.
When his cousin Opal loses a tooth during a visit, Puddle dresses as the Tooth Fairy so that Opal's hope of receiving a shiny quarter will not be disappointed.