I recently read two books from series you guys (meaning my mom and stepmom) might like (if you haven’t read them already)
1. Mistress of the Art of Death
About a medieval, Italian female doctor summoned by King Henry to investigate serial murders blamed on Jews. Really cool period details.
2. In the Bleak Midwinter
An ex-army Episcopalian Priest (female) who investigates a murder and baby-abandonment in a small, new england town with the help of the sheriff.
Both a have a light romance woven in them, but are mostly mysteries. I recommend them because the two female main characters are really cool.