The Fourteenth Rider - Heather Killough-Walden

Fathom Everett, or Faye, is an angel. She isn't the winged, intangible kind, but the living, breathing kind. She risks her safety and future to acquire and share medicine that is off-limits to the misunderstood. She has a gift that helps a little, along with a lot of guts. But one night she arrives to find her scheduled contact dead in the hands of a six-foot-three monster with glowing eyes and a hauntingly beautiful face.
Once trustworthy and tried enough to ride as the Monsters clan's second, Ezekiel Stone's dark deeds have now turned him. The more-monster-than-man has earned troubling command over the underbelly of Chicago's already infamous world of crime. And when he meets the lovely and brave Faye, the handsome ghost becomes enamored, using this scary control to hunt her down.
Faye runs, racing against time and space from someone or something she can't fathom. Until the Monsters' fourteenth rider is there before her, blocking her path. "You...