Zach, a human boy who is actually an extraterrestrial agent for the Galactic Union, travels to California's Lassen Volcanic National Park on a dangerous mission to save the Earth from evil aliens known as the Syndicate.

"Twelve-year-old Fisher Bas and his clone work together to save the world after aliens disguised as twelve-year-old girls invade their town"--

Author Kevin Emerson channels Frank Cottrell Boyce in this tween sci-fi adventure about two kids from opposite sides of the country who find themselves on a road trip to save the world from an impending alien attack. Haley and Dodger have nothing in common. But that was before they learned about the strange, unexplainable phenomena in Juliette, Arizona. Before they both received summer research grants from a mysterious foundation and discovered their...

"When scientists discover a rare and mysterious mineral buried in the Earth's crust, they have no idea that it just happens to be the most valuable substance in the entire universe. It's not long before aliens show up . . . offering a promise of protection, some fabulous new technology, and entry into their intergalactic coalition--all in exchange for this precious resource. A material so precious that other alien forces are willing to start a war...

"After the aliens begin their invasion of Earth, a rebel faction contacts Anaya and proposes a plan that would allow humans, hybrids, and cryptogens to coexist peacefully, though it is unclear if all hybrids will agree"--WorldCat.

"Four young Starbounder students must once again risk their lives, travel throughout space,and dismantle an evil conspiracy to save their world"--

Buddy Burger escapes his home planet, lands in Hollywood, and is cast in a new television series, but must pretend his six eyes and suction-cup feet are the costume and his human skin, real.

Eleanor and her mother Samantha are working seperately and preparing for a journey to find the Master Concentrator when an alien spacecraft lands on Earth and throws the globe into a crisis that Eleanor works to control.

"After a year on Mars, a young boy and his family migrate to the planet Choom, but the inhabitants of Choom, the Zhuri, who look like giant mosquitoes, don't really like humans and it up to the boy and his family to change their minds if they hope to survive." --

In Central Park, Zack and his dad encounter an alien who has lost his spaceship, which has been towed because it was illegally parked.