Thirteen-year-old Mallory, twins Jared and Simon, and their mother move into the broken-down Spiderwick Estate only to find themselves in the dark and mysterious world of faeries.
The Grace children, Jared, Simon, and Mallory, having discovered a field guide to fairies and other magical creatures at their Aunt Lucinda's house, find themselves the victims of mean tricks designed to get them to give up the book.
After his family moves to Florida, Nicholas Vargas finds an ally in his new stepsister when a little nixie with a huge problem comes to him for help, giants start to destroy their neighborhood, and a hydra threatens the entire state.
After returning home from their latest adventure, Mallory, Jared, and Simon find Mulgarath, an ogre and leader the goblins, has taken their mother captive along with Uncle Arthur's field guide.
Chronicles the adventures of the Grace children after they go to stay at their Great-Aunt Lucinda's worn Victorian house and discover a field guide to fairies and other magical creatures.