I have been fascinated by this Netflix series; the second season was recently released. Mindhunter is an American crime thriller web television series created by Joe Penhall, based on the true crime book Mindhunter: Inside the FBI's Elite Serial Crime Unit written by John E. Douglas and Mark Olshaker. The show is so well done; the audience is aware of the horror of the true serial killer crimes without all the "shock and gore". It is set in the 1970's; I love the period automobiles and decor... complete with avocado and harvest gold appliances. It's a great account of the beginnings of the FBI's BAU... behavioral analysis. I enjoyed the series so much that I have ordered the book from Amazon.