Myles and Beckett Fowl are twins but the two boys are wildly different. Beckett is blonde, messy and sulks whenever he has to wear clothes. Myles is impeccably neat, has an IQ of 170, and 3D prints a fresh suit every day - just like his older brother, Artemis Fowl.
A week after their eleventh birthday the twins are left in the care of house security system, NANNI, for a single night. In that time, they befriend a troll on the run from a nefarious nobleman and an interrogating nun both of whom need the magical creature for their own gain . . .
Prepare for an epic adventure in which The Fowl Twins and their new troll friend escape, get shot at, kidnapped, buried, arrested, threatened, killed (temporarily) . . . and discover that the strongest bond in the world is not the one forged by covalent electrons in adjacent atoms, but the one that exists between a pair of twins.