When farm boy Homer Pudding's explorer-uncle dies and leaves him a droopy dog with a mysterious coin hidden on its collar, it leads him to The City, where they meet Madame La Directeur, the conniving head of the Natural History Museum, who is trying to steal the coin and take Homer's place in a secret society of adventurers.
Having spirited his parents out of their domed suburb, Martin goes to the school for help and finds that his sister, Cassie, and the other Wonder Babies are gone again, but his AllDog, Chip, may hold the means to save them all.
Imagines what might have happened to a dog befriended by author Jack London during the 1897 Yukon gold rush, and that served as the model for Buck from his novel "Call of the Wild.".
In a future where electronic surveillance has taken the place of love, a veterinarian is putting computer chips in animals to control them, and those creatures choose young Zane, who understands their speech, to release captives and bring them to a technology-free safety zone.
After Annabelle's mother starts dating a new boyfriend, she faces life in a new town with a new school, and a new puppy, and while training the dog Annabelle decides to experiment with some of her training techniques to deal with the unruly middle school boys in her class.