"Twins Will and Annalie Wallace continue to search for their missing father. As the Admiralty closes in, Will, Annalie, and their friends Essie and Pod must evade capture--and pirates--while tracking Spinner's movements around the world in their small sailboat. Following a coded list, they make contact with other former scientists living undercover, and learn disturbing information about the research their father stole and its connection to the global...

Claudia Dalton, twelve, embarks on an unexpected treasure hunt that she hopes will bring her missing father home and heal whatever is wrong with her family. Told through notes, emails, audio and video transcripts, and more from Claudia's scrapbook.

Months after confronting the legendary La Llorona, Paola starts dreaming again, this time about fantasmas that are stalking her and someone who might be even more dangerous--her estranged father.

La protagonista de una famosa serie de televisión desapareció sin dejar rastro. ¿Cómo encontrarla cuando a cada paso de la investigación surgen enigmas enrevesados? ¿Se develan secretos sorprendentes y deben tomarse decisiones peliagudas? Carlos está convencido de que esta es su oportunidad para lanzarse a investigar y demostrar a su madre que está convertido en todo un detective. Pero el tiempo se le acaba y necesitará tu colaboración....

In Dorset, England, twelve-year-old Kat Wolfe opens a pet-sitting business, but the owner of her first client goes missing and only her new friend shares Kat's conviction that the parrot's owner is the victim of foul play.

Forty years after a devastating flood changed the face of the earth, new consequences and challenges are still surfacing. Twins Will and Annalie thought the hardest part about this year was going to be their separation when bookish Annalie began life at a prestigious Admiralty-run boarding school and avid sailor Will stayed behind in the flood-damaged slums. But that was before the Admiralty raided their father's workshop. Before they sent a questioner...

It's been four months since Nicky Roth has seen his best friend and neighbor, Aaron Peterson. Aaron's father, a reclusive theme park designer, told the town that Aaron and his sister Mya are living with a relative far away, but Nicky can't seem to accept it. Plagued by terrifying nightmares of robotic mannequins, rotting theme parks, and a dark basement, Nicky teams up with his friends from school to find out what really happened to Aaron and Mya....

"School's out, and Wiki and Leen Ellison are facing a new challenge... their first summer apart! Genius inventor Leen has been accepted to Petey Thunkle's world-famous summer training program for STEM prodigies with their eyes on the stars. Meanwhile, Wiki is looking forward to her first summer on her own, running the family corn stand and outclassing Otto and Sheed Alston. But the night before Leen's departure, the twins find out that Wiki has also...

Mars Patel's friend Aurora has disappeared! His teachers are clueless. His mom is stressed out about her jobs. But Mars refuses to give up--after all, his own dad disappeared when Mars was a toddler, before he and Ma moved to Puget Sound from India. Luckily, Mars has a group of loyal friends eager to help--smart Toothpick, strong and stylish JP, and maybe-telepathic Caddie. The clues seem to point toward eccentric tech genius (and Mars's hero) Oliver...