Nick and his friend Marta decide to investigate when a mysterious fire starts near a Florida wildlife preserve and an unpopular teacher goes missing.

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.

Thea Stilton and her journalism class try to find a missing student.

While visiting Chicago, twins Ashley and Bryce catch up with old friends, visit the house where they grew up, see many reminders of their deceased father, and help search for their best friends' uncle, who disappeared days before his wedding.

Twelve-year-old Emma Vu, having just moved into a trailer park inhabited by magical beings known collectively as crags, begins learning cat magic in hopes of finding her missing sister, Helena.

While five little mice at Mouseford Academy are looking for their missing biology professor they dive to a haunted shipwreck off Whale Island to find a rare diamond that was lost when the ship sank.

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.

Ranger the time-traveling Golden retriever was trained for search-and-rescue and even though he did not pass the tests he has used his training on his many trips to help people caught up in disasters; now he has arrived at the World Trade Center on the morning of September 11, 2001 just as the first plane hits, and he must rescue fifth-graders Risha and Max who are trapped in the wreckage, guide them to safety, and hopefully reunite them with Risha's...

With her recording contract signed, Tenney is set up to make an album, however when her songwriting accomplice and drummer Logan abruptly vanishes, Tenney marvels in the event that she might want to go solo.