Like many people who read this as a child (according to goodreads), this book has haunted me, and I remember reading it as a child, I borrowed it again and again from my school library, because it felt like a book I needed to keep close to me. I'm not sure if I read it once or twice, but a particular phrase from the ending of the book has lingered with me until this day. I can still vaguely remember the cover of the book, a little girl with a silver crown on her head, talking to a bunny.
Spoilers ahead, if you want to read this book. Even though it's a children's book, it touches on pretty dark concepts and I was kept on tenderhooks throughout the book.
The particular phrase that prompted me to search for the book was
"Who weareth the black crown, I rule.
Who weareth the silver crown, ruleth me."
which is basically what the book is about. It mixes past with present, fantasy with real-life, and technology with magic, in a seamless story centered upon a queen.
It is so unique in its vivid description, plot reveal, and concept, although I feel that the ending is pretty rushed. The concept is so creepy, and even more so because it feels like it could exist in this world where we live.
I don't think I can say anything more about this book. Just read it. If you need a copy, borrow mine.