When the Pearsons arrive to investigate the mysterious Stoneforth Castle, they have no idea that their lives are about to be changed forever – and that for one of them, the castle's ancient hallways represent the end of the road. Alicia has returned from her time abroad, but something's wrong. She seems different, and even Rose has trouble getting through to her. As the two girls team up to explore the castle's dungeons, they discover a strange green door that seems to be key to a series of unspeakable horrors. Something is lurking beyond that door, something that has been waiting centuries for a chance to claim another victim. For Rebecca and Jonathan, meanwhile, the castle represents a chance to fix their damaged marriage. But how can they do that when mysterious whispers are heard coming from the darkest shadows, and when an ancient warning seems poised to break out into the modern world with devastating consequences? The Haunting of Stoneforth Castle is the ninth book in the Ghosts of Rose Radcliffe series, about a team of paranormal investigators and their encounters with the supernatural. Each book tells a standalone story but readers are advised to read them in order.