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.

In the late nineteenth century, when Conor Broekhart discovers a conspiracy to overthrow the king, he is branded a traitor, imprisoned, and forced to mine for diamonds under brutal conditions while he plans a daring escape from Little Saltee prison by way of a flying machine that he must design, build, and, hardest of all, trust to carry him to safety.

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.

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...

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...

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

...

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.

Twleve-year-old private investigator Fletcher Moon, nicknamed "Half Moon" because of his shortness, must track down a conspiracy or be framed for a crime he did not committ.

Two original short stories, plus puzzles, interviews with characters, and other writings that unlock secrets of the Artemis Fowl books, which feature a twelve-year-old evil genius and his dealings with fairies and other magical beings.

In Victorian London, Albert Garrick, an assassin-for-hire, and his reluctant young apprentice, Riley, are transported via wormhole to modern London, where Riley teams up with a young FBI agent to stop Garrick from returning to his own time and using his newly acquired scientific knowledge and power to change the world forever.