This book has the potential to fill the Harry Potter shaped hole in my heart! I loved the living castle that can be loosely compared to The Room of Requirement in HP. But where this book really shines is in the portrayal of the children. When the King and Queen go missing, Rolf the young heir and his sisters Princesses Delilah and Celie find a plot has formed to make Rolf a puppet king to a nefarious council.
The children find strength in each other and the castle as they fight for control of their home. Wonderfully written!