A 12-year-old genius and criminal mastermind, Artemis Fowl, kidnaps a fairy, Captain Holly Short, for a large ransom of gold with the help of his bodyguard, Butler, to restore his family's fortune. In the process, he discovers an underground world of armed and dangerous fairies. The fairies fight back with magic, cunning, and technological weapons leading to a high-stakes battle of wits.

The book revolves around a young girl named Meggie and her father Mo, who possesses a unique ability to bring characters from books to life by reading aloud. This gift, however, comes with a price, as they are entangled in a dangerous adventure when a villain from a fantasy book called "Inkheart" is accidentally summoned into the real world. As they struggle to fix the chaos caused by this crossover, they must navigate a treacherous world of magic and betrayal, while attempting to thwart the villain's sinister plans and protect the balance between reality and the fantastical realms of literature.

This novel introduces readers to a world where ancient magic and modern day collide, centered around the life of Nicholas Flamel, a legendary alchemist who possesses the secret to eternal life. When his powerful book, the Codex, is stolen, Flamel and his wife must rely on the help of two teenage siblings, Sophie and Josh Newman, to recover it. The story unfolds across a backdrop of myth and history, weaving together a thrilling adventure that spans across continents and involves figures from lore and legend. As the twins discover their own untapped powers, they become central to the battle between the forces of good and evil, with the fate of the world hanging in the balance.