The preserve is protected by covenants, or agreements that are ratified by all orders of whimsical life forms who dwell there in order to create a measure of security for the mortal caretakers. This had to happen because mortal man became a dominant force in the world, and enchanted creatures needed a place to flee to. This lets people interact with the magical beings of Fablehaven in safety. The covenants are based o the law of harvest and the law of retribution. So if you do not bother the creatures, they will not bother you. But if you hurt them, they can hurt you back.