There has been a lot in the "book media" that has drawn similarities between this book and Gone Girl. Sure, there are some parts of the story that are alike-- marriage in trouble and murder-- but to be honest I found these books to be quite different. Flynn's story-telling is frenetic, bordering on the edge of spiraling out of control, much like the lives and minds of her infamously hated characters. Harrison's tale is measured and cool, in the way I imagine the protagonists' water-front condo and Jody and Todd themselves. There are a few moments where Todd seems hurtling toward some sort of animalistic desire, rage, or feeling, but he always pulls up short, enters a hotel bar, and sips away at a beer in a frosty pint. Jody, too, is controlled and perfunctory, never revealing any sort of Id simmering just below the surface (which is probably fitting given Jody's disdain for Freud and her whole-hearted embrace of Adler Psychological methods). 
 I will say that I didn't necessarily see the ending coming, which is a good thing. While I enjoyed the book on many levels, the aloofness of it all left me feeling a little empty, whereas Flynn's Gone Girl ignited something in me bordering on fervor.