Grave mercy

 by Robin LeFevers.  In the late fifteenth century, Mortain, the god of death, has sired Ismae to be his handmaiden. She will carry out his wishes by working through the Convent, where she has found refuge from a brutal father and husband. After learning the Convent's wily warfare and womanly arts, and being apprenticed to Sister Serafina (poisons mistress and Convent healer), 17-year-old Ismae is sent to the high court of Brittany, ostensibly as the cousin (aka mistress) of the Breton noble Duval but, in truth, she is there as a spy. Her tacit assignment is to protect the young duchess by assassinating Duval if he proves to be a traitor, a charge made more difficult because of the couple's attraction to each other. LaFevers has written a dark, sophisticated novel true to the fairy-tale conventions of castles, high courts, and good versus evil, and spiced with poison potions; violent (and sometimes merciful) assassinations; subtle seductions; and gentle, perfect love. With characters that will inspire the imagination, a plot that nods to history while defying accuracy, and a love story that promises more in the second book, this is sure to attract feminist readers and romantics alike. HIGH-DEMAND BACKSTORY: With a $100,000 marketing campaign, including national print, online, and social-media outreach; a video trailer; and a vintage T-shirt promotion, the publisher is pushing LaFevers' novel in a big way. --Booklist (Check Catalog)