Jennifer L. Armentrout, the #1 New York Times, USA Today and internationally bestselling author of the Dark Elements novels and the Lux series, returns with book 1 of The Harbinger trilogy, a contemporary fantasy set in the world of her New York Times bestselling Dark Elements series. In this fantastical universe, gargoyle shapeshifters are sworn to guard humanity from the evils of the underworld. One guardian is about to meet a girl with an explosive secret. Should she fall into the wrong hands, her unique powers could unleash an all-out supernatural war.

Eighteen-year-old Trinity Marrow may be going blind, but she can see and communicate with ghosts and spirits. Her unique gift is part of a secret so dangerous that she's been in hiding for years in an isolated compound fiercely guarded by Wardensgargoyle shapeshifters who protect humankind from demons. If the demons discover the truth about Trinity, they'll devour her, flesh and bone, to enhance their own powers.

When Wardens from another clan arrive with disturbing reports that something out there is killing both demons and Wardens, Trinity's safe world implodes. Not the least because one of the outsiders is the most annoying and fascinating person she's ever met. Zayne has secrets of his own that will upend her world yet againbut working together becomes imperative once demons breach the compound and Trinity's secret comes to light. To save her family and maybe the world, she'll have to put her trust in Zayne. But all bets are off as a supernatural war is unleashed...