"Dashiell Gibson, who lives on Moon Base Alpha, has to solve a murder of one of the moon's most prominent doctors"--

"Imagine being forced to move to a new planet where YOU are the alien! The first time I heard about Planet Choom, we'd been on Mars for almost a year. But life on the Mars station was grim, and since Earth was no longer an option (we may have blown it up), it was time to find a new home. That's how we ended up on Choom with the Zhuri. They're very smart. They also look like giant mosquitos. But that's not why it's so hard to live here. There's a lot...

Andy and Terry live in a 130-story treehouse. It used to be a 117-story treehouse, but they added another 13 stories. It has a soap bubble blaster, a time-wasting level, a 13-story igloo, the GRABINATOR (it can grab anything from anywhere at any time). It is a toilet paper factory, and an extraterrestrial observation center for observing aliens. As it turns out, though, it's Andy, Terry, and Jill who are being observed and then abducted by a giant...

To save his father, a Coalition scientist protecting a precious resource, after their ship is attacked, Leo stows away on a strange ship of mercenary space pirates and must decide who to trust- human or alien-to stay alive.

Kevin and his science camp buddies, The Extraordinary Terrestrials, defeated the alien Mim and sent him back to prison--but now a group of his friends have shown up in spaceships, bent on revenge, and it is up the Extraordinary Terrestrials to find a way to defeat the invaders.

A lovable misfit from another planet meets a girl named Tip. The two unlikely friends embark on the greatest journey of all time.

When her mother is abducted by aliens on Christmas Eve (or "Smekday" Eve since the Boov invasion), 11 year-old Tip hops in the family car and heads south to find her and meets an alien Boov mechanic who agrees to help her and save the planet from disaster.

When young Zita discovers a device that opens a portal to another place, and her best friend is abducted, she is compelled to set out on a strange journey from star to star in order to get back home.

"You'd think saving the universe not once but twice would buy you a little time off. Not so for Kevin Brewer and his science-camp buddies. They've just got word that their favorite comic book author, Max Grayson, is in terrible danger--and so is the universe! The kids have no choice but to head to outer space to save their hero and prevent a diabolic breed of aliens from annihilating their home galaxy."--

"Avani is the new kid in town, and she's not happy about it. Everyone in school thinks she's weird, especially the girls in her Flower Scouts troop. Is it so weird to think scouting should be about fun and adventure, not about makeovers and boys, boys, boys? But everything changes when Avani is 'accidentally' abducted by a spunky alien named Mabel. Mabel is a scout too--a Star Scout. Collecting alien specimens (like Avani) goes with the territory,...