What's the Name of That Book??? discussion

The h is about to have a birthday and her white witch mother sends her back into Regency England where she goes into hiding until after her birthday when she will be safe from her dark wizard fathers plans. (If she can refrain from using her own magic and drawing his attention). While their she meets the H who is a white wizard/witch. And is in Regency England to save his brothers life during a battle. Their is a wizard battle near the end of the book.

Ran across book by accident.... It's "Lady X" by Claudy Conn