"The Kidd children--including twelve-year-old twins Rebecca and Bickford--follow mysterious clues that take them from China to Germany, in the hopes of finding their missing father and the treasure that will finally free their kidnapped mother"-- Provided by publisher.

Thirteen-year-old Sophia Tims, with her friend Theo, continues to search for her parents, explorers who have vanished as the borders shift within a world transformed by the Great Disruption of 1799.

When Sky Patel-Baum is sent to live with her mysterious uncle, she never imagines she'll end up in Area 51, a top-secret military base. Sky feels like she's landed in a whole new world, even though she hasn't left the planet. Because guess what? Area 51 is full of aliens. Lots and lots of aliens. But something even stranger is happening in Area 51--aliens are going missing. Where could they be? How come everyone thinks sky and her uncle are involved...

When the difficult star of the reality television show "Expedition Survival" disappears while filming an episode in the Florida Everglades using animals from the wildlife refuge run by Wahoo Crane's family, Wahoo and classmate Tuna Gordon set out to find him while avoiding Tuna's gun-happy father.

Twins Theo and Alexander along with their sister Wil are abruptly dropped off at their Aunt Saffronia's house, where they learn they must complete a series of tasks in order to see their parents again, the first of which is solving a mystery at the Fathoms of Fun waterpark.

Eleven-year-old Juniper sets out on a wild adventure to find her mother and protect a public park just days before Christmas.

The McNeil family has always been professional hoaxers -- tricking bystanders into believing they're seeing legendary creatures like Bigfoot and the Loch Ness Monster. Unlike the rest of his family, twelve-year-old Grayson hates hoaxing and wants nothing to do with the business -- even when the McNeils land a huge job and must pull off four sea monster hoaxes in a week. But when things go disastrously wrong and Dad and Gramps go missing, Grayson and...

"Twelve-year-old twins Bickford and Rebecca Kidd and their two older siblings travel to Africa to track down priceless artifacts that will keep the family's treasure hunting business afloat long enough to rescue their kidnapped mother--and possibly find their missing father"-- Provided by publisher.

When her sister Sylvie goes missing on a snowy morning and is never seen again, Jules refuses to believe she is gone forever, meanwhile, in the shadow world, a shadow fox is born.

Up until her twelfth birthday, Kiranmala considered herself an ordinary sixth-grader in Parsippany, New Jersey, but then her parents disappear and a drooling rakkhosh demon shows up in her kitchen, and soon she is swept into another dimension, full of magic, winged horses, talking birds (very annoying), and cute princes--and somehow Kiranmala needs to sort it all out, find her parents, and basically save the world.