About the Author

John Edward Douglas served as a special agent of the FBI for 25 years. He is widely admired as the leading expert on criminal personality profiling and modern criminal investigative analysis. A veteran of the Air Force, he holds a doctorate degree in adult education and is the author of numerous books, including the #1 international bestseller Mindhunter.

Mark Olshaker is an Emmy Award-winning filmmaker, New York Times bestselling non-fiction author, and critically acclaimed novelist who has worked with Douglas for many years.