After receiving an invitation to spend the summer with their estranged grandmother, the Story cousins arrive at her house only to discover that she is not there, and the longer they stay on the island, the more they realize their mysterious family history has some deadly secrets.

Shortly before her thirteenth birthday, shy and withdrawn Tara is sent to stay with her aunt, uncle, and cousin in her parents' hometown of Willow Falls, where she makes friends and becomes involved with an elderly buyer and seller of collectibles, who seems to be trying to give Tara some kind of mysterious message.

Sixteen-year-old Tomas and his Roma family left Slovakia because of mysterious attacks on his life when he was a child, but when they return, the same creatures of folklore begin to strike again and Tomas, aided by his cousin, will have to bargain with Death herself to set things right.

Sixteen-year-old Jean "Jinx" Honeychurch, the descendant of a witch, must leave Iowa to live with relatives in Manhattan after the first spell she casts goes awry, but she will have to improve her skills to stop her cousin from practicing black magic that endangers them and the boy they both like.

When Fabiola's mother is detained upon their arrival to the United States, Fabiola must navigate her loud American cousins, the grittiness of Detroit's west side, a new school, and a surprising romance all on her own.

In 1817, two English cousins take a honeymoon "Grand Tour of the Continent" with their new husbands and become entangled in a mysterious plot to create a magical Emperor of Europe.

During the summer before ninth grade, intrepid Gilda Joyce invites herself to the San Francisco mansion of distant cousin Lester Splinter and his thirteen-year-old daughter, where she uses her purported psychic abilities and detective skills to solve the mystery of the mansion's boarded-up tower.

When she comes to the realization that she has no real friends despite her many followers on social media, Mari decides to hike the John Muir Trail using her cousin's boots and trail diary. Her thousands of followers helped Mari Turner become an internet starlet. But when she breaks down and posts a video confessing she isn't the happy, in-love, inspirational online personality she's pretending to be, it goes viral and she receives major backlash....