In a future where alien beings consume technology as a few humans try to preserve it, Strata, her brother, and a friend are separated from their caravan and, with a wonderful robotic horse, must fight their way back.

After heroically saving his classmates, fifth-grader Sawyer's life as a dinosaur-human hybrid has gotten a lot easier until Sawyer, Sylvie, who is part Martian, and Elliot head to Mars in search of Sylvie's missing dad and discover that Mars is trying to kick Pluto out of the solar system.

Almost seventeen-year-old Alison, who has synesthesia, finds herself in a psychiatric facility accused of killing a classmate whose body cannot be found.

After an alien attack devastates the Earth, pilot and future astronaut Clover Martinez bands with seven other teens in a struggle to survive.

Queen is the climactic conclusion to New York Times bestselling author Timothy Zahn's thrilling space adventure series, The Sybil's War. Nicole Hammond is a Sibyl, a special human that has the ability to communicate with a strange alien ship called the Fyrantha. However, Nicole and all other sentient creatures are caught up in a war for control between two competing factions. Now, the street-kid turned rebel leader has a plan that would restore...

In rural Ohio, friendships and a beautiful girl prove distracting to a fifteen-year-old who has hidden on Earth for ten years waiting to develop the Legacies, or powers, he will need to rejoin the other six surviving Garde members and fight the Mogadorians who destroyed their planet, Lorien.

Agent Sorn picks Zack up from Earth and together they seek other aliens who can speak in support of inviting that planet to join the Galactic Union, while the Gnairt and the Kiapa Kapa Syndicate try to stop them.

Working to overthrow Queen Levana, a fugitive Cinder and her companions search for Rapunzel-like hacker Cress, who has been trapped on a satellite since childhood and who has received orders from Levana to foil Cinder's efforts

Learning about Planet Pink, Pinkalicious imagines what would happen if an alien Pinktonian paid her a visit.

When police detective Flynn Carroll's young wife vanishes in the middle of the night, his investigation reveals a string of similar disappearances and draws the attention of Special Agent Diana Glass, a member of the most secret police unit on the planet.