The Spiderwick Chronicles, Volume I, Book 1 The Field Guide; Book 2 The Seeing Stone

The Field Guide sets up the story of the Grace children—13-year-old Mallory and 9-year-old twins Jared and Simon—who with their mother move into the dilapidated Spiderwick Estate only to quickly find themselves sucked into a dark and fascinating world of faeries.

In the Spiderwick Chronicles' second book, The Seeing Stone things get even more exciting—and kind of scary—for the Grace kids, as the strange faerie world hinted at in The Field Guide blooms to full life around them. When Mallory and Jared attempt to rescue Simon from goblins, they use a magical stone which enables them to see things that are normally invisible.