Summary of Relentless: From Good to Great to Unstoppable

Direct, unfiltered, and brutally honest, Tim S. Grover’s Relentless is a masterclass in what it takes to be truly unstoppable. Grover, the legendary trainer behind some of the greatest athletes in history, reveals the mindset that separates champions from everyone else: you keep pushing when others quit, you thrive under pressure, and you refuse to let emotions make you weak.

At the heart of Relentless is “The Relentless 13,” a set of defining traits shared by the most intense competitors across sports, business, and life itself. These principles teach you how to trust your instincts, dominate challenges, and get into the Zone where nothing can shake your focus. Grover shows you how to adapt to any situation, spot weaknesses in your opponents, and attack with precision.

With the same uncompromising advice he gives to his world-class clients—summed up in his mantra, “don’t think”—Grover makes it clear that greatness doesn’t come from talent alone, but from the relentless drive to keep improving, no matter how much you’ve already achieved.

Packed with untold stories from the psyches and training of elite athletes, Relentless reveals how even the best keep getting better—and how you can do the same. It’s not about motivation; it’s about transformation. This book doesn’t just inspire—it rewires you to live with the mindset of the unstoppable.