This book is about two identical twin brothers who are leaving high school moving, away to a boarding college. What is a century-old castle it lays in an enchanted forest? In that enchanted forest, there is an old house. In that house is a secret doorway into another world where there's a green forest which leads to a little white village. Where Billy the satyr lives with his wife Octavia, as the twins are excellent friends with Billy and his wife...