War of Heavenly Fire Book Series by Devyn Sinclair

I gave up everything. My power. My future. My life. But will it be enough? I was dragged back to hell for refusing to kill the archangels that stole my heart. They bound me and stripped me of everything: title, dignity, and name. Now I am a slave—my only purpose to exist in suffering. Cassian keeps me close, both my tormentor and my savior, his fury a shield against the rest of hell. But rumors now rock the underworld. The angels are nearly defeated... moreI gave up everything. My power. My future. My life. But will it be enough? I was dragged back to hell for refusing to kill the archangels that stole my heart. They bound me and stripped me of everything: title, dignity, and name. Now I am a slave—my only purpose to exist in suffering. Cassian keeps me close, both my tormentor and my savior, his fury a shield against the rest of hell. But rumors now rock the underworld. The angels are nearly defeated. Hell will be victorious, and everything I gave up will mean nothing. I can’t let them surrender. I cannot watch them die. In order to prevent their deaths, I must remain the Queen of Torment. less