Set early in the 19th century, Powers's ( On Stranger Tides ) seventh novel is a horror story that wonderfully evokes the period. On the stormy night before his wedding, Dr. Michael Crawford, in an ill-advised moment while drinking and carousing with two of his friends, slips his intended's ring on the finger of a statue of a woman in the inn's courtyard. The next morning the statue has disappeared. Disturbed, Crawford purchases a new ring and goes to his wedding. The night's celebrations are followed by a morning infinitely more horrifying than the previous one--Crawford awakens to find his bride murdered. Doubting his own sanity, he flees England, becoming aware that he is pursued by a lamia --a malignant female spirit. He seeks help from his friends, the poets Byron and Shelley, who, it turns out, have experience with such a monster. Strewn with literary personages and allusions, the book is entertaining on several levels, but most particularly as a chilling horror-adventure.