This book by Katherine Marsh is a must-read for children of all ages. It takes the reader on a thrilling journey through a world of fantasy and magic. The story revolves around an orphan girl who finds a mysterious door by the staircase that leads her to a magical adventure. The book is a hardcover edition published by Little, Brown Books for Young Readers in 2016. It is written in English and is perfect for children who love fairy tales and folklore. The book is intended for an audience of ages 2-12. Overall, this is an enchanting book that will captivate and inspire young readers.