Crimson Mourning by Lawrence Hall

Nothing is secure.

This is the unrelenting motto of clan Shaye—where my husband, Damon, leads—and I live in peace and comfort with the rest of the vampires to the west.
But I want more.
The council won’t support our marriage because I’m human, so it’s time to make a change.
By the time they find the real threat, the consequences will prove to be all too deadly.
The fury of this woman scorned lies with the blood of my enemies, and when the dawn breaks the world will see the Crimson Mourning.

Crimson Mourning is the prequel to the books within the Games of the Underworld shared universe. It is a standalone dark romance novel with scenes of violence and assault. It can be read independently, but to get the full story, it is highly recommended to read all the books within the series.