Charlie Kirk’s final book, Stop in the Name of God: Why Honoring the Sabbath Will Transform Your Life, is out and it’s an instant bestseller, selling out on Amazon and low in stock on numerous other sites. The book’s purpose is to “help you discover how observing the Sabbath isn’t a rejection of modern life but a rebellion against busyness and a pathway to genuine connection, peace, and presence.” The book had been completed just prior to Kirk’s assassination on September 10.

Speaking to Chris Cuomo on News Nation Turning Point USA’s Senior Director of Faith, Lucas Miles, discussed the heart behind the book. “This book is about what Charlie found in life, which he lived out. He had peace; he experienced rest. It was it refreshed him. It’s what allowed him to do and to be as effective as he was,” he told Cuomo. “It’s what allowed him to have such a good marriage and be such a good father and to, you know, just find that fulfillment in life. A major part of that was him shutting down, cutting out the distractions from his life, focusing on this Sabbath day.”

David Engelhardt, pastor of Kings Church in New York City, spoke with The New York Post to describe what first inspired Kirk to add a Sabbath rest into his life. “Charlie was under duress, stressed out and said he was having a hard time sleeping. I just said, you need to start observing the Sabbath, you need to start taking 24 hours — block it out and just hang out with God, hang out with your family,” he said. Engelhardt said they “squabbled” over the concept, but that a few months later Kirk called and told him he’d incorporated into his schedule. It became a practice that both Kirk and his wife Erika became devoted to, unplugging from Friday night into Saturday, with the couple often touting the benefits it had done for their family. Soon after then presidential candidate Donald Trump was nearly assassinated in Butler, PA, Kirk posted a comment acknowledging the practice to his followers. “As I prepare to unplug for the Sabbath I am filled with a profound gratitude and joy. This week could have been one of the hardest, darkest, in history,” he wrote. “Instead, by God’s grace, by a few centimeters, our movement continues.”

Engelhardt called the new book “deep.” “It is by far, in my estimation, the best thing he’s ever written ever before. I didn’t expect it to be philosophically deep. It’s philosophically deep. It’s rich. It reads really well. I’m sure he was immensely proud of it.” Kirk outlines his struggles with incorporating a Sabbath rest into his life, noting his responsibilities as the founder of Turning Point USA, his three-hour show, and numerous other tasks. While Kirk was a Christian and not Jewish, Engelhardt discussed the good that Christians can still draw from incorporating a weekly rest into their schedules. “For Christians, the practice of the Sabbath fundamentally says, do I trust God or do I not trust God?” he said. “If you’re not a Christian. I mean, the argument would be the Earth itself has cycles and seasons of rest. Creatures have cycles and seasons of rest, and we as humans need cycles and seasons of rest.”