Enola Holmes, much younger sister of detective Sherlock Holmes, must travel to London in disguise to unravel the disappearance of her missing mother.

When eleven-year-old Gregor and his two-year-old sister are pulled into a strange underground world, they trigger an epic battle involving men, bats, rats, cockroaches, and spiders while on a quest foretold by ancient prophecy.

When his father disappears while experimenting with a black mirror that is a portal to both the past and the future, Jake encounters obstacles when he tries to use the mirror to find his father.

When imposing biology teacher Mrs. Bunny Starch goes missing, Nick and Marta suspect foul play.

When Aero Horizon 16 crashes in the Arctic, eight children emerge from the wreckage to find themselves alone and surrounded, not by ice, but by a mysterious and deadly jungle full of carnivorous plants and predatory birds--the other five hundred people from the plane are gone, not necessarily dead, but taken by something that lives in the jungle.

Eleven-year-old Tilly Pages, who has found comfort in her grandparents' bookshop since her mother's disappearance, now learns that she can bookwander into any stories, and decides to seek her mother.

After years in foster care, April gets to live in a mansion where she and four other children are caught up in a mystery related to a missing heir, a lost legacy, and the Phantom.

Relates the tale of Jack who, after trading his mother's milk cow for magic beans, climbs a beanstalk to seek his missing father in the land of giants.

Paired together after a veteran detective retires, Platypus Police Squad members Rick Zengo, a hotshot rookie, and Corey O'Malley, a hard-nosed old-timer, struggle with their differences while tackling their first case involving a missing schoolteacher and a duffle bag filled with illegal fish.

As ten-year-old Gwyn searches for a missing neighbor in her new town in Iowa, she learns much about her mother, who grew up there but has suffered from memory loss since Gwyn was four.