Whether David Berkowitz, Ted Bundy or Jeffrey Dahmer: there is hardly a US serial killer whom John Douglas, as the world's leading expert and pioneer in the field of profiling, has not interviewed. After his bestseller Mindhunter, the template for the successful Netflix series, he now delves even deeper into the minds of serial killers and other dangerous criminals like the Unabomber in Journey into Darkness. Using numerous, sometimes terrifying cases as examples, he reveals the methods used to track down murderers, their emotions and motives. His journey into human abysses explores monstrous deeds that moved an entire century - but also criminal cases you have never heard of. A must-have for all true-crime fans.