M. William Phelps is the New York Times best-selling author of 45 books and winner of the Excellence in (Investigative) Journalism Award from the Society of Professional Journalists. Phelps has written for numerous publications, including the Providence Journal, Connecticut Magazine and Hartford Courant. Diversifying his talents, Phelps consulted on the first season of the hit Showtime cable television series Dexter. All of which gives him a confluence of expertise and experience to bring to true crime fanatics.

He is the exec-producer, writer and host of the #1 true-crime podcast franchise Paper Ghosts, and now Crossing the Line with M. William Phelps, an ongoing, weekly podcast diving deeply into murder, missing people and unsolved, cold case cases rarely covered. His other podcast, White Eagle, is a narrative, limited series focused on one of the largest cash heists in American history and the search for the man (and the money) who has spent the longest time (40 years!) on the FBI’s Ten Most Wanted Fugitive list.

Phelps has consulted on over 350 hours of true-crime television, executive produced documentaries, and weekly series. Having written 7 books about them, he is a highly sought-after expert and speaker for his extensive knowledge regarding historic and contemporary serial killers—and the psychology shaping the mind of the murderer.

Beyond crime, Phelps has written several history books, including the acclaimed, New York Times bestseller, the only official nonfiction biography about the Revolutionary War hero, NATHAN HALE; THE DEVIL'S ROOMING HOUSE,the true story of "Arsenic & Old Lace (in development as a major motion picture); THE DEVIL'S RIGHT HAND, the complete story of the (Samuel) Colt dynasty; MURDER, NEW ENGLAND; and FAILURES OF THE PRESIDENTS.

In a revealing essay for The Edge magazine, which ignited a firestorm of support and social media dialogue, Phelps published A MILLION VOICES, MENTAL ILLNESS, A LIFE CHANGED FOREVER in January 2019.