In Eoin Colfier's riveting 432 page book
Artemis Fowl: The Time Paradox, tells of fourteen year old child prodigy Artemis Fowl in a quest to give up his criminal ways and save his mother's life from a terrible disease. Aided by unmentioned parties, he time travels back in time to find his mother's cure, but accidentally brings his greatest enemy back into his time, causing two of them to be loose on Earth.