Twelve-year-old Edge has lived her entire life on Crescent Island. She is a Forax, an anthropomorphic creature similar to a squirrel. She lives in a treehouse overlooking a big lake surrounded by mountains. In the summer, the valley is full of life, and this is when Edge loves to visit the Grotto where she studies the insects and other animals she finds there. Edge wonders: Are there any other animals that can talk the way she and her mother can? Her question is answered when she meets Xalma the amph, a gryphon named Jessop, and a rover named Sole.

All twelve-year-old Edge has ever known is her home on Crescent Island. In her eyes, the entire world is composed of the peculiar Insects she likes to study on the island and her mother, Mana. Edge could live happily ever after with her mother in their tiny bubble. But when Edge meets a boy her age named Jessop, she can’t help but be fascinated by his strange appearance and lively personality. 

Edge Anomaly: The Spirit of Crescent Island is a book following Edge, a 12-year-old Forax, and her friends on a harrowing adventure across the land of Marrow. All her life, Edge believed that she and her mother, Mana, were the only creatures capable of speech. She studied the Insects with her mother for her whole life, never knowing or caring about the world outside of their tiny bubble.