Jackie's Book of Fire. This book is filled dark magic. Jackie is still learning how to control her powers and how to contain them within spells. She doesn't really pick up this book because it could turn her into a Dark Witch.
Though I ship Ron and Hermione hardcore, there is no denying that Harry and Hermione have a beautiful friendship. And this dancing scene is one on my fav scenes for the movies. Glad they added this scene.