Darby was such a badass! Ashley was such a creepy sociopath that he was legitimately scary! There were a lot of twists that I didn't expect: Ashley being a kidnapper, Sandi being involved in the plot, the reststop name mixup causing the police to go to the wrong place, the cop shooting Darby instead of Ashley. 

This was a pretty good thriller, but the gore was a bit disturbing. I didn't anticipate that there would be actual gruesome torture in this book. Also, I would have liked a bit more to the resolution. Darby literally got her fingers cut off, got shot, and broke her ankle to save Jay, and yet she only gets one line of dialogue after being rescued.