"One week after their eleventh birthday, the Fowl twins--scientist Myles, and Beckett, the force of nature--are left in the care of house security (NANNI) for a single night. In that time they befriend a troll who has clawed his way through the earth's crust to the surface. Unfortunately for the troll, he is being chased by a nefarious nobleman and an interrogating nun, who both need the magical creature for their own gain, as well as a fairy-in-training...

When a plant blooms out of fifteen-year-old Laurel's back, it leads her to discover the fact that she is a faerie and that she has a crucial role to play in keeping the world safe from the encroaching enemy trolls.

Years after her sisters venture Outside and vanish in a snow squall, thirteen-year-old Tag sets out to rescue the lost Youngers, accompanied by an unlikely crew--Boots, who can climb anything; Ant, who will eat anything; and Ren, who will say anything. Includes author's note.

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.

Gracie Gillypott and Prince Marcus embark on a dwarf-watching outing, not knowing that the dwarves are working frantically making crowns for a royal wedding and that they have enlisted some unreliable trolls to help them, thus putting the humans' expedition in peril.

Princess Pulverizer tries to help the village of Ire-Mire-Briar-Shire, where every cow, goat, and sheep has vanished, but she and Lucas are captured by a troll, putting her Quest of Kindness in peril.

"For monster sleuths Tank and Fizz, proving fourth-grade bully Rizzo Rawlins is planning to cheat in the upcoming Battle Bot Cup should be a piece of cake. But cake crumbles fast, and the case soon leads the detectives to a mysterious hacker known only as the Codex, who threatens all of Rockfall Mountain with a very dark fate. With the help of their wizard-in-training partner, Aleetha, Tank and Fizz leap into action, dodging deadly battle bots and...

If the brave knights cannot defeat the evil wizard and his army of giant trolls, the castle will be lost!

Hedgie, the hedgehog, helps Henny, the speckled hen, trick the Tomten who has been eating all of Henny's eggs for breakfast.

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