Matrix, by Lauren Groff

In 1148, Marie de France at 17 has been running her family’s estates since the death of her parents and trying to avoid coming to the attention of Eleanor of Aquitaine, with whom she has a familial connection. When Eleanor does notice her, she declares the tall, sturdy girl with a rural accent too gauche for marriage or life at court, and sends her to England to be prioress of a run-down abbey.

Initially homesick and shocked by the poverty and near-starvation of the nuns, Marie summons the stre...