When she and her family move to Oregon, Maya discovers that the kids in a nearby apartment building perform magic and use portals to visit other worlds, a situation that is complicated by Maya's efforts to safeguard an alien.

Alex, a resourceful seventeen-year-old running from her incurable brain tumor, Tom, who has left the war in Afghanistan, and Ellie, an angry eight-year-old, join forces after an electromagnetic pulse sweeps through the sky and kills most of the world's population, turning some of those who remain into zombies and giving the others superhuman senses.

California high school students Kaida, Zeke, and Joy fall into a parallel universe in which all resembles their normal lives except that there is no medicine nor health care, which could mean big trouble for Joy, whose arm was injured in the accident that started their troubles.

Two visitors from another world enter the secret valley of Azul Island and provide Steve with a chance to see how Flame can do in competition with the world's fastest horses.

After fleeing the Moon, fifteen-year-old Phaet Theta hides on Earth and plots how to rescue her siblings from the wrath of the Lunar government.

In 2041 twelve-year-old Dashiell Gibson is a resident of Moon Base Alpha, and at the moment he is faced with a number of problems: coping with the nasty Sjoberg twins, finding out how the commander of the base has managed to disappear from a facility no bigger than a soccer field, and dealing with the alien Zan who communicates with him telepathically from afar--and who is hiding a secret which may threaten the whole Earth.

"Two young settlers on a pioneer planet seek to stop a war and to save the intelligent alien treecats from exploitation by unscrupulous humans"--

"As a war between robots and humans looms on the horizon, Nick, Kevin, and Cass continue to battle the bots that enslaved humanity--but when they are separated, they must fight the war on their own"--

When his stepmother's remarriage drives him from home, Max and a hobo fake their way into the Space Stewards, Cooks, and Purser's Clerks brotherhood to get an opportunity for space travel in an age when only the wealthy are privileged.

After the Axis Institute is blown up, fifteen-year-old Cadell Piggot is unhappily stuck in foster care with constant police surveillance to protect him from the evil Prosper English until he gets an offer to join a mysterious group called Genius Squad.