"Great depth and a satisfyingly inventive history." -- Booklist. In the distant future, Mars monitors activity on its rival planet Nightshade with "haunt-tech" -- powerful objects possessed by spirits of the dead. When the technology reveals a threat to a young messiah, a Martian warrior attempts to protect the girl from Nightshade's assassins. An atmospheric blend of fantasy and science fiction shortlisted for the Arthur C. Clarke Award in 2006.