ABC News has called Marc Hartzman "one of America's leading connoisseurs of the bizarre" and George Noory from Coast to Coast AM said he's "as bizarre as Robert Ripley." Hartzman considers both high praise since his passion for the unusual started with Ripley's Believe It Or Not and the annual Guinness World Records books during his youth.
In addition to his books about UFOs, ghosts, Mars, Oliver Cromwell's embalmed head, weird things on eBay, sideshow performers, and unorthodox messages from God, Hartzman has written for Mental Floss, HuffPost, AOL Weird News, All That's Interesting, The Morbid Anatomy Online Journal, The MUFON Journal, and Bizarre magazine. He's discussed oddities on CNN, MSNBC, Ripley’s Radio, History Channel’s The UnXplained, Xploration Outer Space, the Travel Channel's Mysteries at the Museum, and dozens of podcasts. Hartzman has also been a featured speaker at a various of events for a range of audiences, including the Explore Mars Humans to Mars Summit in Washington, D.C., the Coney Island Congress of Curious Peoples, New York ComicCon, the Exeter UFO Festival, and the Brooklyn Historical Society.
Outside of these projects, Hartzman earns a living as an award-winning advertising creative director.