Written to Die by Ann Simas
Grace and Aidan are newlyweds, but among their wedding gifts is a copy of the manuscript ME Doug Hacker is writing about her cases. When Grace goes back to work, she realizes she must be wrong. Her cases are secondary and Doug is the target. When that flops, she and the ME plan to meet at Surgery 10 to look at his autopsies.
That’s when the dark creature appears. Thinking it came in on Winken, Blinken, and Nod’s UFO changes everything. The problem is, wherever Grace goes, the creature is there, except for when she and the others meet in the church, It definitely doesn’t like anything to do with religion. From that moment on, everyone starts carrying crosses.
Grace starts thinking about ways to deter the creature and settles on exorcism, but how do you exorcise a dark creature?