The Spiderwick Universe is a fictional world created by authors Tony DiTerlizzi and Holly Black. It centers around the adventures of the Grace children—Jared, Simon, and Mallory—who discover a hidden realm filled with magical creatures after moving into the old Spiderwick Estate. The story is primarily told through the book series titled The Spiderwick Chronicles. In this universe, the children encounter various fantastical beings, including fairies, goblins, and other mythical creatures. The series explores themes of family, bravery, and the importance of understanding the unknown. The universe has expanded to include a film adaptation and additional related works, enriching the lore surrounding the magical world.