Lucinda's Secret

In the third installment of the Spiderwick Chronicles, the Grace children return to the faerie world when they find their Great Aunt Lucinda, who sends them on a mission to uncover the secrets of the Spiderwick estate. As they encounter challenges including being attacked by goblins, dealing with a bridge troll, and hiding an injured griffin, the children grapple with the importance of the Guide, a resource documenting fantastical creatures. They soon realize that the Guide is their only protection but also highly desired by the faeries. With their Aunt Lucinda as their only source for answers, the children delve deeper into the mysteries surrounding their family and the faerie world.