Book excerpt: Set in Dublin and Siena, with its dizzying, dare-devil Palio horse race, this is a story about taking chances, being brave and learning the best way to see the world. Some people step through a wardrobe to find adventure, but Minty follows the twisty-turny trees into Nettlebog. There she finds Ned Buckley - the moody, mysterious boy who never talks at school.