As the first stand alone novel by this author, I wasn't sure what to expect but was excited to see if it lived up to the brilliant Thorne novels. And it did in my opinion! The central character of Helen Weeks was likeable without being squeaky clean and boring, and the plot just as tense and dramatic. And the cameo of Thorne himself only added to the story. Giving it 4.5 really, only marking it down as I got a little lost and confused by the plot towards the end, it was wrapped up nicely though and everything made clear. Definitely makes me look forward to more stand alone books in the future!