As her mother prepares to be a contestant on the 1970s television game show, "The $20,000 Pyramid," a twelve-year-old New York City girl tries to make sense of a series of mysterious notes received from an anonymous source that seems to defy the laws of time and space.

The youngest of the Murry children must travel through time and space in a battle against an evil dictator who would destroy the entire universe.

While picking up milk for his children's cereal, a father is abducted by aliens and finds himself on a wild adventure through time and space.

Polly's stay with her grandparents in Connecticut becomes an extraordinary experience as she encounters old friends and mysterious strangers and finds herself traveling back in time to play a crucial role in a prehistoric confrontation.

When eleven-year-old Olive and her distracted parents move into an old Victorian mansion, Olive finds herself ensnared in a dark plan involving some mysterious paintings, a trapped and angry nine-year-old boy, and three talking cats.

In 1940, when Delphi Keep is taken over by the Royal Navy as a communications outpost, Ian, Theo, and Carl dread being evacuated to the earl's winter residence where they will no longer be protected, but are even more concerned about deciphering the third prophecy and identifying the Secret Keeper.

Every question is answered, every truth is revealed in the final installment of the #1 "New York Times"-bestselling Pendragon series. The final battle has begun, and the saga's passionate fan base will not be disappointed. Each of the Travelers returns home to learn the truth about their origins before being reunited for a final, ineveitable confrontation with Saint Dane, whose efforts to control Halla are destroying its very foundations.

Kate, Michael, and Emma have passed from one orphanage to another in the ten years since their parents disappeared to protect them, but now they learn that they have special powers, a prophesied quest to find a magical book, and a fearsome enemy.

"Teenage genius Artemis Fowl and his arch rival Opal battle to the last in this eighth and final book in series"--

When Jonah and Katherine travel to early 1900s Switzerland and Serbia to return Albert Einstein's daughter, Lieserl, to history, her mother Mileva grasps entirely too much about time travel and has no intention of letting her daughter go.