**Soon to be an Amazon limited series directed by Academy Award winner Ed Berger from Robert Downey Jr.'s Team Downey**A serial killer. Two literary legends. One chilling true story.1969: The hippie scene is vibrant in Provincetown, Massachusetts. Long-haired teenagers roam the streets, strumming guitars and preaching about peace and love... and Tony Costa is at the center of it all. To a certain group of smitten young women, he is known as Sire--the leader of their counter-culture movement, the charming man who speaks eloquently and hands out hallucinogenic drugs like candy. But beneath his benign persona lies a twisted and uncontrollable rage that threatens to break loose at any moment. Tony Costa is the most dangerous man on Cape Cod, and no one who crosses his path is safe.As Costa's crimes shock the nation, two icons--Kurt Vonnegut and Norman Mailer--race to claim the story. Obsessed and competitive, they launch dueling investigations, each trying to turn a real-life nightmare into literary glory.Immersive, unflinching, and shocking, Helltown is a landmark true crime narrative that transports us back to the turbulent late 1960s, reveals the secrets of a notorious serial killer, and unspools the threads connecting Costa, Vonnegut, and Mailer in the seaside city that played host to horrors unlike any ever seen before. Praise for Helltown: "A riveting, often spine-tingling true crime story." -- Terence Winter, The Sopranos, Boardwalk Empire"Smart, impeccably researched, and utterly absorbing... an unqualified triumph." -- Gregg Olsen, #1 NYT bestselling author of If You Tell"Compelling, complex, and revealing--do not miss this!" -- Hank Phillippi Ryan, USA Today bestselling author of Her Perfect Life