Fablehaven  Fablehaven is a fantasy book series for children written by Brandon Mull. The book series, which includes "Fablehaven", "", "", "", and "", is published by Shadow Mountain in hardcover and Simon & Schuster in paperback. It is followed by the five-part sequel series Dragonwatch. The series begins as 13-year-old Kendra and 11-year-old Seth Sorenson are traveling to their Grandpa and Grandma Sorenson's house while their parents are away on a 17-day cruise. When they get there, they also meet Dale, the groundskeeper, and Lena, the housekeeper. Grandma Sorenson is "mysteriously" missing. Grandpa Sorenson does not tell Kendra and Seth about Fablehaven being a secret preserve for magical creatures at first, but instead sets up a rather complex puzzle involving six keys and a locked journal for Kendra to solve. Once Kendra unlocks the mostly blank journal, she discovers the words "Drink the milk." She and Seth drink the magical milk opening their eyes to a whole new, mystical world full of the magical beings of Fablehaven. Then Kendra and Seth must face challenges such as defeating an evil witch and a powerful demon, defending the preserve from an evil society, stopping a plague that changes creatures of light into creatures of darkness, and ultimately, protecting the world from a horde of imprisoned demons. The story begins with Kendra and Seth visiting their grandparents in Connecticut while their parents take a 17-day cruise. At first, the siblings entertain themselves with an attic full of interesting books and toys, and a pond-like swimming pool surrounded by hummingbirds, brightly colored-butterflies and exotic dragonflies that seem too beautiful to be real. But soon their attention wander to the forbidden forest that surrounds their grandparent's house. When Kendra discovers a book entitled Journal of Secrets and follows the directions to "Drink the milk" that is supposedly very poisonous, a whole new hidden and amazingly mysterious world is revealed to the siblings at Fablehaven. Kendra and Seth find out quickly how dangerous this new magical environment is when rules are broken, thrusting them into the middle of a fight for their lives. The second book returns us to the Sorenson siblings the following year, where a strange new student has infiltrated the school in disguise, causing mischief and Kendra is the only one who can see the charade. The Society of the Evening Star, an ancient organization determined to overthrow magical preserves and use them for their own intents and purposes, is on the move and is determined to infiltrate Fablehaven.