Fallen Ever After — A.C. James

Arie Cush wanted Holly from the very first moment he met her. A night at the Hellfire Club (HFC) is filled with old friends and new danger. The long-standing feud between the faeries that run the Chicago Crew and a lethal toxin puts Holly and other fledgling vampires in danger. Can they stop a vampire-fae war that's been brewing for nearly a century?

when danger strikes again.
Holly Ellis is still adjusting to their relationship and her new supernatural gifts. She never figured on another battle and she certainly didn't count on a war. Despite the synthetic threat that could hurt their kind, Holly has been waiting for answers her entire life. She finally gets them when her godmother helps her discover even more about the family she never knew. But is there more to Arie's past? And who exactly is the mysterious T anyway?