From 2020 to 2026, Jonathan Karp served as President and CEO of Simon & Schuster, leading the company’s numerous publishing groups as well as its international companies in Australia, Canada, India, and the United Kingdom. Mr. Karp first joined Simon & Schuster in June 2010 as publisher of the company’s flagship imprint. Prior to joining Simon & Schuster, Mr. Karp was Publisher and Editor in Chief of Twelve, an imprint of the Hachette Book Group, which he founded in 2005, publishing such bestsellers as God Is Not Great by Christopher Hitchens, Columbine by Dave Cullen, True Compass by Edward M. Kennedy, and War by Sebastian Junger. He began his publishing career in 1989 as an editorial assistant at Random House, where he worked for sixteen years, rising to Editor-in-Chief. At Random House, Mr. Karp acquired and edited an eclectic and diverse list of bestselling fiction and nonfiction titles including Seabiscuit by Laura Hillenbrand, What Should I Do With My Life? by Po Bronson, Thank You For Smoking by Christopher Buckley, Faith of My Fathers by John McCain and Mark Salter, Franklin and Winston by Jon Meacham, and The Orchid Thief by Susan Orlean.

Kyle Mazer is the Assistant Editor and Publicist for Simon Six, working with authors through every stage of the publishing process. As an editor, he seeks bold, narrative-driven political and historical nonfiction and distinctive fiction. In addition to supporting Jonathan Karp’s list, he has contributed to bestselling campaigns at Simon & Schuster, including Regime Change by Maggie Haberman and Jonathan Swan, 107 Days by Kamala Harris, Notes on Being a Man by Scott Galloway, and The Greatest Sentence Ever Written by Walter Isaacson. He graduated from Yale University, where he received the T. Whitney Blake Prize for excellence in English, music, and community building.