Douglas, John E.: - John Douglas is the legendary FBI criminal profiler and former Chief of the FBI's Behavioral Sciences Unit where he researched, investigated, and conducted interviews of some of America's most violent criminals. Over the past half-century, he either directly worked on or had overall supervision in over 5,000 violent crime cases. He is one of the foremost experts of the criminal mind, its methods, and motivations. Douglas is a veteran of the United States Air Force and holds a doctorate degree in Education, and lives with his wife, Pamela, in the Washington, DC, area.

Olshaker, Mark: - Mark Olshaker is an Emmy Award-winning documentary filmmaker and author of thirteen nonfiction books and five novels, including Einstein's Brain and The Edge. His books with former FBI Special Agent and criminal profiling pioneer John Douglas, beginning with Mindhunter and most recently When a Killer Calls, have sold millions of copies and have been translated into many languages. Mindhunter was recently adapted by David Fincher into a critically acclaimed and award-winning dramatic series on Netflix. Olshaker and his wife, Carolyn, an attorney, live in the Washington, DC, area.