Helltown: The Untold Story of a Serial Killer on Cape Cod

**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

Casey Sherman is a New York Times, Wall Street Journal, USA Today & Boston Globe Bestselling Author of 17 books including "The Finest Hours" (now a major Walt Disney Studio motion picture starring Chris Pine & Casey Affleck), and "Patriots Day" (now an acclaimed motion picture from CBS Films starring Mark Wahlberg and Kevin Bacon). Sherman's 2023 true crime bestseller "Helltown," is now in development as a limited television series for Amazon Studio. Sherman will serve as Executive Producer on the project, which is slated to star Oscar Isaac ("Dune"), with director Edward Berger (Netflix - "All is Quiet on the Western Front"), and produced by Team Downey (Robert Downey, Jr. & Susan Downey - HBO's "Perry Mason"). Sherman's other books include James Patterson's "The Last Days of John Lennon," which spent more than 23 weeks on the New York Times bestseller list, "12: The Inside Story of Tom Brady's Fight for Redemption," and "Hunting Whitey: The Inside Story of The Capture & Killing of America's Most Wanted Crime Boss. Sherman has appeared on more than 100 television and radio programs and is a contributing writer for TIME Magazine, Esquire, The Washington Post, The Daily Beast, Boston Magazine and the Boston Herald.