Sentinel was established in 2003 as a dedicated conservative imprint within Penguin Group. It publishes a wide variety of right-of-center books on subjects like politics, history, public policy, culture, religion, and international relations.

Some of Sentinel’s most noteworthy bestsellers include Do the Right Thing and A Simple Christmas by Mike Huckabee; A Patriot’s History of the United States by Larry Schweikart and Michael Allen; An American Son by Senator Marco Rubio; Unintimidated by Governor Scott Walker of Wisconsin; The Secret Knowledge by David Mamet; Keeping the Republic by Governor Mitch Daniels of Indiana; Roger Ailes: Off Camera by Zev Chafets; The Tyranny of Clichés by Jonah Goldberg; and George Washington’s Secret Six by Brian Kilmeade and Don Yaeger – a runaway New York Times bestseller for more than three months.

Meet Sentinel

Bria Sandford

Editorial Director

Bria Sandford joined Sentinel in 2012. Fascinated by shifting political coalitions, she is drawn to counterintuitive takedowns of conventional wisdom. She enjoys editing a wide range of idea-driven nonfiction, with a focus on history, sociology, economics, and good old-fashioned polemic. Her bestselling and critically acclaimed authors include Brian Kilmeade, Rod Dreher, Reihan Salam, Ken Starr, and Senator Mike Lee. She tweets at @blsandford.

Helen Healey

Assistant Editor

Helen Healey joined Sentinel in 2017 as an editorial assistant. She aims to discover fresh voices who no longer fit the traditional conservative mold, but who have redefined the right altogether. She enjoys editing controversial and counterintuitive critiques of democracy, capitalism, feminism, and solutions to poverty. Recently, she acquired books by Allie Beth Stuckey and Dave Rubin, which will be published in 2020.

Adrian Zackheim

Adrian Zackheim

Founder, President, and Publisher

Adrian Zackheim joined Penguin Group in September 2001 as Publisher of Portfolio. He then took on the additional challenge of starting Sentinel in April 2003. In 2018, he announced the addition of another new imprint to the group: The Optimism Press, in collaboration with Simon Sinek.

Previously, he was the Associate Publisher and Editor-in-Chief of HarperInformation, a division of HarperCollins that included HarperBusiness. His editorial career has also included positions at William Morrow, Doubleday, and St. Martin’s Press, and his first job was as School and Library Publicity Assistant at G.P. Putnam’s Sons, which was then a privately held small publishing company. He later moved to Putnam’s Editorial department under the leadership of Editor-in-Chief Phyllis Grann.

Among the many bestselling books he edited and published before joining Penguin Group were Good to Great by Jim Collins; Die Broke by Stephen Pollan and Mark Levine; The Dilbert Principle by Scott Adams; The HP Way by David Packard; and Swim with the Sharks without being Eaten Alive by Harvey Mackay. He has also published many prominent conservatives, including Newt Gingrich, Ross Perot, Bob Dole, Margaret Thatcher, Donald Rumsfeld, Ben Carson, and Marco Rubio.