Mistress of the Art of Death by Ariana Franklin
It's 1171 and King Henry II has a problem. Children are being murdered in Cambridge, and the Jews have been blamed, which wouldn't matter much, except the King gets a lot of taxes from them. The Jews are currently under the King's protection in a castle fortress, but the situation needs resolved. He requests aid from the King of Sicily, who send an unlikely trio to England: Simon of Naples, a Jewish investigator; Mansur, a eunuch Saracen; and Adelia Aguilar, a woman doctor trained in the study of corpses.
The medieval setting was fascinating.. Religion and politics are completely intertwined. The crusades are on-going. There are calls for the Jews removal from England. Women have little to no value or sway. Adelia, herself, has to pretend she is not as competent and knowledgeable as she is, just to avoid being burned as a witch. Women in historical novels are so often more progressive and have more agency than the majority did...