After thirteen-year-old Tucker Feye's parents disappear, he suspects that the strange disks of shimmering air that he keeps seeing are somehow involved, and when he steps inside of one he is whisked on a time-twisting journey trailed by a shadowy sect of priests and haunted by ghostlike figures.

For most of Tony Gilbert's life, he has thought of his uncle as "Weird Uncle Charlie." That is, until Uncle Charlie moves in with Tony and his family. Uncle Charlie is still odd, of course--talking about spirits and other supernatural stuff--but he and Tony become fast friends, and Tony ends up having a lot of fun with Uncle Charlie. When Uncle Charlie dies suddenly, Tony is devastated. Then he starts seeing Uncle Charlie everywhere! It doesn't help...

"Wyatt and his friend Augie aren't looking for a fight. They're having the time of their lives hang out in the fort they built in the woods. fishing and hunting, cooking over a campfire, and sleeping out. But when two older boys mess with the fort--and with another kid who can't fight back--the friends are forced to launch Operation Doom, with unexpected results for all concerned." -- Dust jacket.

With their father en route to Africa for Doctors Without Borders, city-kids Nicholas and younger twin sisters Haley and Hetty are off to spend the summer with their Great-Uncle Nick at his house on Forsaken Lake. Despite some initial doubts, Nicholas is right at home in the country: he learns to sail, learns about his father as a boy, and makes fast friends with a local-girl, the tomboy Charlie.
The summer takes a turn toward the mysterious, though,...

His mother left three years ago, so when twelve-year-old Flip's thieving father dies he goes to live with his stern and hostile uncle on the remote Dutch island of Mossum; there he works on the farm, dreams of his mother coming to get him, deals with the local bullies, and his only "friend' is a strange, mute girl whom he thinks of as the ghost girl--until he rescues a horse from the stormy sea and discovers a new purpose in caring for his charge....

Orphaned Anthea Cross hopes to finally find a home with her long-lost uncle, but she soon learns not only that he secretly breeds forbidden horses, but that she can communicate with them.--Provided by Publisher.

Samantha's uncle mysteriously disappears, leaving behind extravagant gifts for her siblings and an old, rusty, red umbrella for Samantha which may contain clues to his whereabouts.

Twelve-year-old Xavier Moon gets the courage to step out of the shadows when his great-uncle gives him some outlandish socks and some even stranger requests.

With his Uncle Horatio trapped in an enchanted sleep by the power-hungry Alchemist, Milo sets off with Alessia to find a cure with the help of the Botanist. In their hunt for an antidote, they must forage in the Secret Garden, challenge Robin Hood, and confront the mighty Jabberwock.

"The art of Auntieology and Uncleology is a sacred craft, but ten-year-old Leo has an Uncle Mo--a clueless stationery supply salesman with good intentions--who just doesn't get it. Yet." -- Provided by publisher.