The story of the adventures in space and time of Meg, Charles Wallace, and Calvin O'Keefe (athlete, student, and one of the most popular boys in high school). They are in search of Meg's father, a scientist who disappeared while engaged in secret work for the government on the tesseract problem.

Sprouting a tail and spikes over the summer before fifth grade, Sawyer, a boy with the dinosaur gene, is bullied in school, but when his tormentors begin to disappear, it is up to Sawyer, his best friend Elliot, and a mysterious new girl to rescue them from a galactically horrible fate.

In Tokyo, fifteen-year-old Daniel X faces two of the most dangerous aliens on the planet, who are plotting to use video games to control children and turn them into an army of doom.

Publisher Anno: The Human Garde Academy was created in the aftermath of an alien invasion of Earth. It was meant to provide a safe haven for teens across the globe who were suddenly developing incredible powers known as Legacies. Taylor Cook was one of the newest students and had no idea if she?d ever fit in. But when she was mysteriously abducted, her friends broke every rule in the book to save her. In the process, they uncovered a secret organization...

As Naomi and her fellow teen astronauts investigate the fate of their predecessors on the Europa colony, back on a deteriorating Earth, Leo works with a renegade scientist to warn the crew about hostile extraterrestrials. Leaving Earth behind is hard, but what's ahead, on Europa, could be worse. The International Space Training Camp continues to hide the truth about what happened to the last group of astronauts who attempted a similar colonization...

In 2041 on Moon Base Alpha, thirteen-year-old Dash must solve the mystery of how Lars was poisoned before the base loses oxygen, forcing the colonists to return to Earth.--Provided by publisher.

News stations across the country are reporting mysterious messages that Earth has been receiving from a planet--Alma--claiming to be its creator. If they're being interpreted correctly, in seven days Alma will hit the kill switch on their "colony" Earth. True or not, for teenagers Jesse Hewitt, Cate Collins, and Adeem Khan, the prospect of this ticking time bomb will change their lives forever. Jesse, who has been dealt one bad blow after another,...

Secret agent Bubble07, who exactly resembles a stuffed toy, is on Earth to assess whether or not the unicorns should invade the planet--but despite some bizarre Earth customs like show-and-tell, and annoying Earth dogs, ultimately suggests that Earth would serve as an excellent vacation destination for unicorns.

In this picture book, a boy writes a letter to an imagined alien, explaining all the things he will need to know about Earth and the people who live here--and adding a postscript asking what the alien might look like.

Seven-year-olds Bradley, Brian, Nate, and Lucy make observations and gather clues that convince them that their older siblings, cousin, and animals have been captured by hungry space aliens.