The Apprentice Graduates - The Alchemist, #3

Dana Bedwen may have become a dark mage despite her wishes, but now she needs to learn how to use it. As she graduates from University, she also needs to settle in the rural area she is being sent to, to repay for her education. There, in Kesteven, she'll continue her magical apprenticeship, with her two Magical Masters following there, even as her husband, Detective Jack Taylor, starts uncovering some of the area's dark secrets.
The Society of Learning, the remnants of the Inquisition, haven't forgotten about Dana, either, and some of her family's secrets will be revealed, despite Dana's preference for ignorance. Book three of the Alchemist steampunk series.