Mary, a troubled teenage detective, must solve a missing persons case as she discovers the reimagined origins of infamous Disney Villains.

Rushing to the sleepy seaside village of Porthaven to help her grandmother when her granddad mysteriously vanishes, Mia discovers a diary on an empty fishing boat and begins exchanging notes with a local girl who makes excuses for not meeting Mia in person, adding to an already mystifying situation.

Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace.

Eleven-year-old Gabriel, with the help of the young raven Paladin, which whom he has a magical bond, travels to the foreboding land of Aviopolis, where he must face challenges and unanswerable riddles to rescue his long-missing father.

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.

Told from separate viewpoints, Chess, Emma, and Finn Greystone, ages twelve, ten, and eight, investigate why their mother went missing and uncover their ties to an alternate world.

While his widowed mother continues to search for him, eleven-year-old Tom, presumed dead after drifting away down a river, finds himself trapped in a series of underground caves with another survivor and a dog, and pursued by murderous treasure-hunters.

In 1871 Wisconsin, thirteen-year-old Georgia sets out to find her sister Agatha, presumed dead when remains are found wearing the dress she was last seen in, and before the end of the year gains fame as a sharpshooter and foiler of counterfeiters.

On a cold winter day in Chicago, Early's father disappeared, and now she, her mother and her brother have been forced to flee their apartment and join the ranks of the homeless--and it is up to Early to hold her family together and solve the mystery surrounding her father.

When seventh-grader Calder Pillay disappears from a remote English village--along with an Alexander Calder sculpture to which he has felt strangely drawn--his friends Petra and Tommy fly from Chicago to help his father find him.