The Girl with the Iron Wing — Marie Andreas

Death is stalking the fey. Thousands of years ago, the fey races crossed the Veil into the human world to save themselves. Hundreds of years ago, the fey saved humanity from being wiped out by the Black Death. Now something is coming after the fey--from Earth and from beyond the Veil. As a detective with the LAPD, Aisling Danaan has seen it all, and as an elf from a powerful, guarded clan, she sees more than most. But no one has ever seen a fairy explode from iron poisoning. The winged fey who died was one of various fey races that outnumber humans in a world where the Black Death nearly wiped out humanity. Over time, the species mingled, and magic and technology developed equal standing. But the strange and violent murder threatens to unbalance the peace that the fey High Council brought through the Veil. Called out by name by the killer, Aisling must unravel a tangle of secrets reaching deeper and wider than any case she's ever worked. And one of the most vexing mysteries is super spook Reece Larkin. With badges from too many questionable agencies, the sexy, troublesome spy seems to know more than he's willing to share--and what he won't tell could kill them. They'll have to work together to hunt down the source of the poisoning before the entire fey population on Earth is destroyed by the Iron Death.