This was a fast read, but not a particularly good example of Gardner's storytelling talents. The whole book felt weirdly isolated, taking place in a vacuum where only the crime, the people involved, and a few officers existed. A tight focus for a story is okay, but here it became a stranglehold that seemed artificial. There was also too much repetition overall, far too many exhaustive descriptions about unimportant details.
I didn't like the story's over-reliance on Nicky as an unreliable sometime-narrator. She endlessly cycled through her harrowing memories, so that after a (short) while, her trauma became merely tedious. I didn't develop sympathy for her, I just wanted the story to move along. The other characters, with the possible exception of Wyatt, were not given enough scope to develop beyond one dimension here. And D. D. Warren's presence was simply an unwelcome distraction.
The book was not without a handful of clever plot twists, and did keep me reading. However, the melodramatic ending was somewhat unbelievable, a little surprising, and generally unsatisfying. It doesn't mean I'll give up on Gardner entirely, but I'll probably approach her future books with a little less enthusiasm.