"New hiking boots call for a hiking adventure! Pack your backpack with snacks, water, and a map, and join an uncle and his nephew as they head out for their trip, but this time, the kids lead the way!"--

While on a journey from Chicago to San Francisco on the California Comet with his uncle, amateur sleuth Hal Beck stumbles into a mystery when the daughter of a billionaire tech entrepreneur goes missing.

When Julia has a terrible day at school, her uncle cheers her up by introducing her to the Triple C, the Childish Children's Club, where slowing down and enjoying the simple and silly things in life are encouraged.

"It was the summer before Emma Phineas Wilkey (who everyone called Ferris) went into the fifth grade. It was the summer that the ghost appeared to Charisse, the summer that Ferris's sister, Pinky Wilkey, devoted herself to becoming an outlaw, and the summer that Uncle Ted left Aunt Shirley and moved into the Wilkey basement to paint a history of the world. When a ghost shows up at the threshold to Ferris's grandmother Charisse's room, Ferris worries...

Chloe is jealous and sad when her favorite uncle announces that he will be getting married, but as she gets to know Jamie better and becomes involved in planning the wedding, she discovers that she will always be special to Uncle Bobby--and to Uncle Jamie, too.

Bobby finds himself in the territory of Cloral, a world entirely covered by water, which is nearing a huge disaster. He learns that it is up to him to help rid the area of marauders and locate the legendary lost land of Faar, which may hold the key to Cloral's survival.

Quagmire Tiarello prides himself on not needing anything from anybody. Sure, his mom is skipping work again and showing signs of going into one of her full-out spins, but it's nothing he can't handle. He's used to her up-and-down moods, even if this time it feels a little different. Then his mom disappears, and Quag must find shelter with an uncle he didn't know he had. Should he come clean about his mother's mental health challenges? Or can he use...

When seventh grade Noah discovers he can manipulate gravity, he is excited to train with Gravitas, a top-secret government agency, but his excitement is tempered by the revelation that his great-uncle Saul is both on the agency's most-wanted list and holds the key to unlocking Noah's full potential.

Marc hopes that his Uncle Jake can help him turn around his terrible summer, which he has to spend at camp with Nathan James, who is mean and annoying, while longing for a fancy new bike his parents will not buy him.