Having used their magic tree house to travel to India, where they must get a gift to help free the dog Teddy from a spell, Jack and Annie have adventures involving a tiger and other endangered jungle animals.

Artemis's mother has contracted a deadly disease -- and the only cure lies in the brain fluid of African lemurs. Unfortunately, Artemis himself was responsible for making the lemurs extinct five years ago. Now he must enlist the aid of his fairy friends to travel back in time and save them. Not only that, but he must face his deadliest foe yet...his younger self.

Tom and Eddie, identical twins and mirror opposites living on two different Earths some fifty years apart, must switch places and identities to thwart the alien scientists who threaten their planets.

On Midsummer's Eve, Dan and Una enact A Midsummer Night's Dream three times over--right under Pook's Hill. That is how they meet Puck, "the oldest Old Thing in England," and the last of the People of the Hills. Through Puck, they are introduced to the nearly forgotten pages of old England's history and to characters that can illuminate their own historical predicaments.

"The cyclical nature of day and night frames a heartfelt exploration of the shared experiences that bring us all together"--

Bobby Pendragon is a fourteen-year-old boy who is swept off to an alternate dimension know as Denduron, a territory inhabited by strange beings, ruled by a magical tyrant, and plagued by dangerous revolution.

When a spaceship lands in the small town of Vern Hollow in 1956, juvenile delinquent Jack Creedle and prim, studious Isadora Shumway form an unexpected alliance as they try to keep a group of extraterrestrials from stealing eccentric Uncle Bud's space travel machine.

After moving with her parents to Iowa, twelve-year-old Lucy discovers a mysterious notebook that can bring stories to life and which has a link to the 1914 disappearance of her great uncle.

Ten-year-old Kara follows mysterious tracks in the snow that lead her across time and space from modern-day Sweden to 1942 Germany where two siblings are hiding from the Nazis.

Budding scientist Lucy builds a rocket ship and accidentally sends her beloved dog, Laika, into space.