"The Hunt for the Seventh" is a children's mystery novel by British author Christine Morton-Shaw, published in 2008. The story follows 11-year-old Jim, who is sent to live with his grandfather in an old mansion in England after his parents die. Jim discovers that his grandfather, a retired architect, had been obsessed with finding a hidden secret room in the mansion, where the seventh stone of a mystical carved angel was said to be hidden. Jim becomes involved in the mystery when he starts seeing strange visions of a young girl who disappeared in the mansion years ago, and he sets out to unravel the secrets of the house and the missing stone. The novel is praised for its atmospheric setting and engaging plot, as well as its exploration of themes of grief, family, and the power of imagination. It has been recommended for middle-grade readers who enjoy suspenseful and supernatural stories.