The Grace children, of course, suspected that the forced move from their New York apartment to their great-aunt's country mansion would change their lives. But they had no idea how profound these changes would be. The dilapidated old house greeted the new residents unwelcomingly, and on their very first night, the children discovered a mysterious hiding place in the wall. And then an actual secret room, where eighty years earlier, Arthur Spiderwick, the estate's previous owner, had hidden an amazing book. Opening it, the children discovered that nearby—no, right here, in this very house!—lived creatures the rest of the world considered figments of old fairy tales. Griffins, goblins, hobgoblins, elves and gnomes, trolls and forest spirits! This discovery led to a series of incredible encounters, dizzying adventures, and dangerous predicaments. While many fairies are quite sweet and peaceful creatures, there are some you'd be better off never meeting. And one such monster has been plotting to get Arthur Spiderwick's book at any cost for eighty years...