The Seeing Stone. Spiderwick Chronicles 2

The Grace kids are just beginning to get used to Aunt Lucinda's strange old mansion when Simon suddenly disappears. Jared and his sister have to rely on the help of a mischievous house boggart, a nasty bridge troll, and a loud-mouthed hobgoblin to get him back. Illustrations. The Seeing Stone was published alongside the first book in May 2003. After the Grace children ignore Thimbletack's warning to destroy the Guide, Simon is abducted by a group of invisible goblins who live in the woods surrounding the house. Thimbletack leads Jared and Mallory to the old carriage house where they find a "seeing stone" (a stone with a natural hole in it) which gives the wearer, in this case Jared, the ability to see faeries (called the Sight). After Jared and Mallory narrowly avoid being captured by the goblins, they go searching for Simon in the woods. On their way through the forest, they encounter a troll residing in the river by a decrepit stone bridge. Partially protected by the daylight, they are able to avoid it, but lose their fencing swords. After encountering a wounded griffin, they find the goblin camp and a plethora of prisoners hanging in cages made from refuse from the trees. While trying to rescue Simon, they meet a prisoner named Hogsqueal, a hobgoblin, who convinces them to help him escape in exchange for his help in rescuing Simon. Hogsqueal offers to spit in their eyes, which gives them the Sight without using the stone. Hogsqueal distracts the goblins from the children's escape and in return, Jared, Simon, and Mallory attract the goblins' attention away from Hogsqueal and then flee, leading the goblins back to the troll. Jared convinces the troll to let them escape in return for leading the goblins to him to eat. After they arrive home, Simon convinces them to return to the now empty camp to release the rest of the goblins' victims and they take the injured griffin to the carriage house. After confronting their scared and angry mother, they discover that Thimbletack, enraged at Jared's forceful taking of the seeing stone, has again become a Boggart and reverted to his mischievous ways.