Syd Chambers knows that there's life on other planets because he's descended from it. His father was from a distant world called Denza and has been missing-- presumed dead-- for years. When Syd discovers a device his father left behind which shows not only that he's alive, but where he is, Syd must set out on a mission of his own. Along the way he discovers a deadly, unbearable secret that could destroy Denza, Earth, and the universe. -- adapted from...

Overwhelmed by the mystery and turmoil of her twin sister's disappearance, Payton struggles with the reality of being the one left behind. As Payton pries open her blocked memories in an attempt to find answers, the farther down the path of danger she heads.

A deadly, mysterious epidemic is sweeping the country, and young kidnap victim Callie is one of the few who survived infection, only to be sacrificed by her captors at a secret lab working with antimatter; her older brother Kai is desperate to find out what happened to her--his best hope lies with Shay, the girl who last saw Callie alive, and together they will seek answers, even if it means evading soldiers and crossing the quarantine zone.

Desperate to keep his kiddie pizzeria from bankruptcy, Jack lets his animatronics tech pitch him a new invention that might just give him some perspective. Frustrated by an unfair arcade game, Colton throws himself into re-engineering the device at any cost. Marley's best friend goes missing on a tour of the Freddy's Pizza Factory; she knows what really happened... but her guilt isn't the only thing threatening to eat her alive.

While searching for the father who left her and her mother ten years ago, thirteen-year-old Samantha begins to believe that the twin sister who supposedly died when they were three years old is still alive.

Fifteen-year-old loner Jason struggles to hide father's declining mental condition after his mother's death, but when his father disappears he must confide in the other members of a therapy group he has been forced to join at school.

Young Ven Polypheme is sent on a secret mission within the walls of the Gated City, a former penal colony in the land of Serendair, where he and his friends face kidnapping and even worse dangers from the ruthless Thief Queen, who is trying to reclaim her runaway daughter.

"Jane Doe and her father, John, appeared on the steps of the Manor the night the earthquakes started and the gateway to the Otherworlds closed. Fourteen years later, Jane enters the Manor to save her missing father . . . and the world"--

When her best friend Lydia disappears, Piper Sail goes searching for answers in the dark underbelly of 1924 Chicago, uncovering deep corruption that may lead back to her affluent neighborhood.