After Jack becomes apprenticed to a Druid bard, he and his little sister Lucy are captured by Viking Berserkers and taken to the home of King Ivar the Boneless and his half-troll queen, leading Jack to undertake a vital quest to Jotunheim, home of the trolls. Gathering the lambs -- Apprentice -- Shadow across the water -- Valley of lunatics -- Hrothgar's golden hall -- Wolf-headed men -- End of days -- Rune of protection -- Rider on the nightmare...

A troll tries to prevent Trigg from crossing the bridge on the way to school only to be outwitted by the boy's riddles.

Eccentric Aunt Sally comes from Canada to babysit the Anderson children while their parents are on a trip to Paris and every night the bedtime story adds another piece to a very suspect family history.

Teen troll Gog and his best friend Pook work as roadies for a troll rock and roll band until Gog's younger brother gets kidnapped.

Dora and her friends demonstrate the use of good manners, as they help the troll find his best friend Mouse, so he can apologize for treating him badly.

Eleven-year-old Suzy Smith joins the troll-operated Impossible Postal Express, but she botches her first delivery by stealing a cursed snow globe containing a boy who claims there is a plot to take control of the Union of Impossible Places.

Thirteen-year-old Twig, having always looked and felt different from his woodtroll family, learns that he is adopted and travels out of his Deepwoods home to find the place where he belongs. Young Twig lives in the Deepwoods, among the Woodtrolls, but he isn't one of them. In a brave attempt to find out where he belongs, Twig wanders into the mysterious, dangerous world beyond the deepwoods. He meets a collection of odd companions, such as his wise...

Clever Karin thinks of a way to drive an enraged troll back into the forest.

With the aid of her magic wooden horse, a brave girl travels to the High House in the mountains to rescue her kidnapped brother from the trolls.

A young man with a mysterious past and a penchant for inventing things leaves the troll who raised him, meets an unhappy princess he has loved from afar, and discovers a plot against her and her father.