Unseen

Gemma LaPorte, a veterinarian in rural Oregon, comes to in a hospital bed with her car wrecked and the last three days of her life simply gone. Detective Will Tanninger tells her she is the prime suspect in a hit-and-run that left a convicted child molester fighting for his life. Gemma has no memory of the crash, no memory of the victim, and no alibi.

To clear herself she has to put her trust in the man investigating her, and Will has to weigh what he believes about Gemma against what the evidence says. As her memory returns in fragments, she finds her own handwritten notes about brain function and begins to suspect the concussion is not the whole explanation for the blank in her mind.

Running alongside her story is a killer who takes his time with his victims, and the two threads converge as Gemma gets closer to understanding what she did, or did not, do. Published in 2009, Unseen is a romantic-suspense thriller in the vein of Bush's other Oregon-set novels, and Goodreads catalogues it as the second entry in the Colony sequence she shares with her sister Lisa Jackson, though it reads as a standalone.