Eoin Colfer

When a twelve-year-old evil genius tries to restore his family fortune by capturing a fairy and demanding a ransom in gold, the fairies fight back with magic, technology, and a particularly nasty troll.

After his last run-in with the fairies, Artemis Fowl's mind was wiped of memories of the world belowground and any goodness grudgingly learned is now gone, with the young genius reverting to his criminal lifestyle. Artemis has no memory of the fairy people and has returned to his unlawful ways. In Berlin, he is preparing to steal a famous Impressionist painting from a German bank. He doesn't know that his old rival, Opal, has escaped from prison...

Wyvern, Lord Highfire of the Highfire Eyrie, is the last dragon on Earth and is hiding out in a Louisiana swamp. He strikes a deal with Cajun swamp rat Squib: Squib will keep him company and fetch supplies for him and Vern will protect Squib from the dirty cop that is chasing him. However, there will be soon be a fiery reckoning, in which dragons either finally become extinct or Ver's glory days are back.

Artemis's mother has contracted a deadly disease -- and the only cure lies in the brain fluid of African lemurs. Unfortunately, Artemis himself was responsible for making the lemurs extinct five years ago. Now he must enlist the aid of his fairy friends to travel back in time and save them. Not only that, but he must face his deadliest foe yet ... his younger self.

Opal Koboi, power-crazed pixie, is plotting to exterminate mankind and become fairy queen. If she succeeds, the spirits of long-dead fairy warriors will rise from the earth, inhabit the nearest available bodies and wreak mass destruction. But what happens if those nearest bodies include crows, or deer, or badgers -- or two curious little boys by the names of Myles and Beckett Fowl? Yes, it's true. Criminal mastermind Artemis Fowl's four-year-old brothers...

"In Juniper Lane's world, everyone knows Santa doesn't do Christmas anymore. Juniper is still eager to celebrate Cedar Park's Santa Vigil in honor of her late father, who never stopped believing in Santa Claus. But then her mother goes missing and the park's bureaucratic director declares the vigil is canceled. On the advice of her friend Duchess, Juniper seeks the help of a mysterious and grumpy woodsman, who seems an awful lot like Santa Claus,...

The second Fowl Twins adventure, a spinoff of the blockbuster Artemis Fowl series, starts with a bang—literally.
Artemis's little brothers Myles and Beckett borrow the Fowl jet without permission, and it ends up as a fireball over Florida. The twins plus their fairy minder, the pixie-elf hybrid Lazuli Heitz, are lucky to escape with their lives.
The Fowl parents and fairy police force decide that enough is enough and the twins are placed

...

In futuristic Satellite City, fourteen-year-old Cosmo Hill escapes from his abusive orphanage and teams up with three other people who share his unusual ability to see supernatural creatures, and together they determine the nature and purpose of the swarming blue Parasites that are invisible to most humans.

When their mother starts dropping them off at the library several afternoons a week, nine-year-old William and his brother dread boredom and the overbearing librarian, but they are surprised at how things turn out.

Every Saturday, while helping polish the lens of the lighthouse his grandfather tends, nine-year-old Will tells a tale he hopes will top Grandad's, but Grandad always wins until Dad reminds Will of a long-forgotten escapade with his brother.