Threat Level: Nightfall

Billie Keller and her pixie partner, Onyx, are running out of time.Derik Cote isn't hiding anymore. He's building an army of genetically engineered magical monsters and unleashing them across Washington, DC. Every attack leaves more destruction, more casualties, and fewer chances for Billie and the FBI's Magical Threats Division to stay ahead.Capturing one of Derik's operatives should have been a breakthrough.Instead, they got nothing...except Eileen back in the lab building even deadlier tech.Now Derik has vanished, cutting ties even with his girlfriend, Erin-Billie's friend. That makes Erin safer, but it also means Derik is planning something bigger than ever.Then Billie learns about a convoy carrying a cache of powerful magical artifacts.Derik will come for them. So will Billie. If it's a trap, they're walking straight into it.If it isn't, it may be their last chance to cripple Derik before his army is unstoppable.When the dust settles, nothing will be the same.Billie, Onyx, the FBI's Magical Threats Division, the Vegas AET, and the DC Pixies will have to risk everything to survive a battle that could decide the future of magic itself.Threat Level: Nightfall is the explosive seventh book in the Billie Keller urban fantasy series, packed with relentless action, dangerous magic, martial arts, laugh-out-loud humor, and enough snark from Onyx to keep everyone honest.Scroll up and join the fight.