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. The first book in the blockbusting new series from global bestseller Eoin Colfer.