The Mares of Merryland Chase

On her ninth birthday, Smiley Sunshine South discovered a secret world when she received a package from her ancestor, Hilaria Halfacre. Inside was... Deed of Inheritance By my hand and the power vested in me, I, Hilaria Halfacre, also known as the Most High Hilaria of Mirrandia, do give and bequeath this key and the land of Mirrandia to the next Hilaria born of my blood. This paper shall serve as an official Deed of Identity. Signed this day by my hand, Hilaria Halfacre. Smiley's off to Mirrandia to take up her title, but some people are not too pleased to see her. Worse still, some of them aren't actually people!