Acknowledgements

I thank all the great folks at the Aaron M. Priest Literary Agency, as well as a fine team at HarperCollins, UK: Sarah Hodgson, Anne O’Brien, and the marketing staff behind the scenes. I also wish to acknowledge Dr Martha Stout and Ms Barbara Bentley, whose respective books The Sociopath Next Door and A Dance with the Devil: A True Story of Marriage to a Psychopath started a line of thought that became this book.