"A Study in Honor"

I just finished Claire O'Dell's novel "A Study in Honor", the near-future story of Dr Janet Watson, a veteran of the Civil War being waged against the New Confederacy, and of her becoming associated with Sara Holmes, who is not what she seems. Recommended, and I understand that I haven't seen the last of Watson & Holmes.

https://www.barnesandnoble.com/w/a-study-in-honor-claire-odell/1127330167?ean=9780062699305#/