When an imaginary creature appears under the porch, Fern looks in her book to determine its name, decides it's a purple snerd, and spends the day playing with it.
Twelve-year-old Olive, an only child who lives with her high-powered lawyer-mother in a ramshackle house at the beach in Australia, does not fit in at the Joanne d'Arc School for Girls, so when her best friend drops her for a more popular girl and Olive suddenly meets her own, more confident twin sister, the two of them go in search of their long-lost father.
Thirteen-year-old Spencer Honesty and his imaginary friend, an Indian called Chief Leopard Frog, improbably achieve fame and riches in the abandoned town of Paisley, Kansas, when Spencer begins taking photographs with his deceased father's ancient camera and Chief Leopard Frog has his poems published by a shady businessman in the Cayman Islands.
When Hank Wolowitz runs into trouble in the form a of lunch-stealing bully, he finds an unlikely ally in an invisible refugee pumpkin-loving bandapat named Inkling.
Lulu Atlantis is peeved when her mother brings home little brother Sam, and she turns to her imaginary friend, Harry the daddy long-legs spider, for comfort, companionship, help, and advice as she is getting used to the addition to the family.
