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It is frequently said that leadership is both an art and a science, requiring fortitude, flexibility, and vision. “Knowing yourself is the beginning of all wisdom,” as Aristotle once stated. How can someone stay focused and clear under pressure? Effective leaders, according to research, succeed not just at managing tasks but also at building trust, accepting ambiguity, and growing from mistakes. Success rarely happens in a straight line; instead, it is influenced by perseverance, moral decisions, and the capacity to form teams that challenge and support one another, as demonstrated by historical leadership tales and individual experiences. This expert roundup offers ideas based on practical difficulties and careful consideration, examining how various leadership ideologies and experiences converge on these timeless truths.

Table of Contents

Combat Book Shapes Leadership in Crisis Moments

One book that has always stuck with me is “On Combat” by Lt. Col. Dave Grossman. I first read it early in my career and it gave me a different way to think about what it means to lead people through high stress situations. It talks a lot about how the body and mind respond under pressure, and how preparation, training and mental discipline make the difference when seconds count. That perspective shaped how I approached every role I had, from being a SWAT sniper to serving as a commander responsible for so many lives during critical incidents. It is also what guided me in 2018 during the Santa Fe High School shooting when I had to lead more than a thousand first responders through something no one ever wants to face. That book helped me understand that leadership is as much about keeping calm and clear as it is about tactics. It has influenced the way I now work with Byrna, where the mission is to equip officers and security professionals with tools and training that give them more options, better outcomes and, ultimately, a way to go home safely at the end of every shift.

Joshua Schirard, Director, Byrna

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Lincoln’s Team Building Strategy Transforms Real Estate

The biography that really stuck with me is “Team of Rivals” about Abraham Lincoln. What surprised me was not the history but how he led people. He pulled in people who didn’t always agree with him, some who had even run against him, and he listened to them. That was a big shift for me. 

When I started out in real estate, I thought success meant proving myself as the one with all the answers. Over time, and probably because of that book, I learned that the real strength is building a group of people who see things differently and then trusting them. That shaped how I built The Justin Landis Group. We are not a team of people who all think the same way. We are a team that argues, debates, and challenges each other because that makes us better for our clients. Lincoln’s way of making people feel heard, even when he made the final decision, showed me what humility and confidence look like together. That balance is something I try to bring into the room every day. It has shaped how I hire, how I lead, and how I think about growth in a really personal way.

Justin Landis, Founder, The Justin Landis Group

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Patagonia Founder’s Ethics Reshape Exhibition Leadership

The biography that resonated most for me was “Let My People Go Surfing” by Yvon Chouinard, founder of Patagonia. It fascinated me a lot, primarily because this is not a typical business biography with corporate fluff. It is an honest, grounded story about trying to create something of value, without separating who you are as a person from your values. I also found it appealing how Chouinard did not dissociate business ethics from personal ethics. He took issues like sustainability, transparency, and quality seriously with more conviction than just being a marketing strategy. 

This kind of perspective, or mindset, has influenced how I approach leadership at Muller Expo. I am not the only one in our industry, but I focus on doing it right, making a commitment to respect people’s time, and that every bit of work should have something to be proud of. I also appreciated his leadership style as hands-on and deeply engaged, but I would not describe him as micromanaging. The bottom line is trust your people, let them own their work, and lead with quiet confidence. 

Consequently, I took some important things from the book. First, success is not being the loudest, nor the biggest. Rather, you can be successful by consistent work, responsible practice, and being bold enough to try different things. That was the takeaway.

Jamilyn Trainor, Owner and Senior Project Manager, Müller Expo Services International

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Bennis Biography Inspires Authentic Leadership Development

One biography that shaped my career and leadership approach is Warren Bennis’s story. He was a pioneer in leadership who focused on being self-aware and authentic in how leaders lead. His biography made me understand the importance of understanding your strengths and weaknesses, and how that gets reflected in building trust among teams. It directs me to lead with authenticity and intention, creating spaces in which people feel enabled to develop and contribute.

Bennis also emphasized that leadership is a learning process and not something that one strives to achieve. This aligns with the work that we do in creating soft skills to help individuals and organizations be flexible and build performance. Leadership must be thought out and acted upon from real experience. This is what makes for motivation on my part to create learning solutions that yield tangible tools and models so that leaders and employees can solve issues better. Leadership is development and service, professional and personal. The challenge is how to continue growing while permitting those around us to do the same.

Bradford Glaser, President & CEO, HRDQ

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Covey’s Family Framework Revolutionizes Estate Planning

**Stephen Covey’s “The 7 Habits of Highly Effective Families”** completely transformed how I approach both estate planning and my own life decisions. When I read about creating a destination, flight plan, and compass for families, it clicked that wealth transfer isn’t just about legal documents—it’s about multi-generational family governance.

This book taught me to stop thinking like a traditional attorney who just drafts wills and trusts. Instead, I started developing what became my Legacy Secure Plan, which integrates legal, financial, and educational strategies to prevent family conflicts over inheritance. Before reading Covey, I was handling estate planning and probate litigation simultaneously, which required completely different systems and left me scattered.

The “one thing” concept from Covey’s framework helped me finally pick my niche after 25 years of practice. I realized I was trying to be everything to everyone—from music to double majors in college, then estate planning AND litigation. When I applied Covey’s focus principles, I could see that life insurance disputes was where I could make the biggest impact.

Most importantly, Covey’s family-systems thinking showed me that protecting wealth means protecting family relationships. That’s why I now focus on preventing the fights that tear families apart after someone dies, rather than just writing documents that might create those fights later.

Paul Deloughery, Attorney, Paul Deloughery

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Pixar’s Culture of Failure Drives Innovation

*Creativity, Inc.* by Ed Catmull, the co-founder of Pixar, totally reshaped how I think about leadership. He’s all about building a culture where people aren’t afraid to fail — because that’s where the best ideas live. That mindset pushed me to create a more open, feedback-driven environment at Prose. Instead of pretending we have all the answers, we treat projects like creative collaborations. It’s a way less stressful — and way more innovative — way to lead.

Justin Belmont, Founder & CEO, Prose

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Drucker’s Management Principles Guide Recruiting Excellence

The leadership biography that has influenced me the most is Peter Drucker’s, known as the father of modern management. His lessons on effective leadership, people, and a results-driven mindset have influenced me early in my supply chain career. Drucker’s theory of management, as the “doing things right” rather than leadership as the “doing the right things,” has been a tenet in the way I organize teams and interface with clients.

At SCOPE Recruiting, that translates to an exacting yet empathetic recruiting style. I try to anticipate client needs with the rigor Drucker taught, and to make every candidate placement a long-term success. His writing has allowed me to marry operational excellence and human intuition.

Drucker’s philosophy continues to inspire me to become a reflective leader who combines analytics and instinct, something I believe is crucial in the dynamic practice areas of supply chain and talent acquisition.

Friddy Hoegener, Co-Founder and President, SCOPE Recruiting

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Granier’s Principled Leadership Balances Heart and Head

The biography that made the most significant impact on my life, professional choices, values, and leadership style is that of Lori Granier. The reason Lori Granier’s biography impressed me is because it exudes strong leadership, grit, and focus. Lori is a person that takes on responsibility and ownership and then works until the job is done to her satisfaction. The characteristics I most admire about Lori are her intelligence, humility, and vision.

Lori Granier is astute in a manner that is both rare and refreshing. Not only is she a visionary who sets high standards and has achieved a great deal of success, but she has also found ways to effectively maintain a long-term, wider perspective. She is the epitome of one who does not let obstacles or setbacks deter her but rather seeks solutions while staying true to the mission. I also admire her ability to be decisive yet ethical, to be bold and yet fully aware of the interests of others. Lori Granier is principled, confident, and morally courageous, never giving up, always having the right intention to strive for betterment.

It is very admirable the way she advocates for people. She makes them feel heard and supported and always seeks collaboration and consensus. She is a balance between heart and head, which is what I work towards. Lori Granier’s story has taught me that a good leader is someone who brings out the best in others, not because they have to but because it’s the right thing to do.

Jackie Sons, Owner, Native Wildflowers Nursery

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Rockefeller’s Quiet Discipline Trumps Business Celebrity

Reading “Titan: The Life of John D. Rockefeller, Sr.” by Ron Chernow, left me with the impression of a highly disciplined man who eschewed bombast in favor of quiet, relentless consistency. It was quite different than other biographies I’d read, where the subject’s personality seemed to be the main focus. Rockefeller, on the other had, wasn’t known to be especially charismatic. He preferred restraint to reactivity and never let his emotions get the better of his long-term planning.

That really inspired me as an entrepreneur. Sometimes, business can feel like a popularity contest — but in the long-term, it’s not. I was reminded to focus less on flash and more on substance, knowing it would pay off in time.

Emotional control is underrated in the contemporary era, but when it comes to future-proofing your business, it’s far better to be a calm and thoughtful leader who centers strategy over celebrity.

Jon Hill, Managing Partner, Tall Trees Talent

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Mandela’s Unwavering Principles Shape Leadership Journey

“Long Walk to Freedom.” As a young person just starting life, it shaped my perspective and showed me very early how important it is to have core unwavering principles. At great physical and emotional costs, Nelson Mandela fought against systematic segregation and racism. 

Nelson Mandela was a man of peace, but he wasn’t afraid to do what was necessary to make his voice heard. When peaceful protests showed no progress, he switched to militant styled resistance. He was eventually arrested and kept in prison for 27 long years, with hard labour.  Long enough to break any man. But not Nelson. 

When he was eventually released, he was the face of peace and reconciliation. He stayed in his country instead of seeking exile and spearheaded negotiations to dismantle apartheid after international pressure made the South African government crumble. 

The election was the first time black South Africans could vote, and they voted for the symbol of a man Mandela had become. Under the flag of the ANC, he won overwhelmingly with 62% of total votes. Nelson Mandela was the first democratically elected President in South Africa’s history, chosen by all races. 

His story was one of rugged determination and persistence to core values. He was the most tortured of men, but he remained peaceful and meek to the end. A real motivation for my young sell and any would be leader.

Dale Gillespie, Business leader, Chief operating officer, auto expert, marketer,, DIRECTKIA

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Rockefeller’s Attention to Detail Builds Business Empire

The biography that really shaped my career and the way I lead is “Titan: The Life of John D. Rockefeller, Sr.” The guy started with $4 and ended up shaping American business for a century. Rockefeller built his fortune by sweating the small stuff: tracking every nickel, never wasting a minute, and setting a standard so high that even his toughest rivals had to respect it. The numbers do not lie. Every contract, every dollar, every risk, and every deal matters. He knew how to win, but he knew how to stay calm when the floor dropped out, which, in my world, is worth more than any degree.

So, I took a page from Rockefeller when building my own companies. I pay close attention to details, even the ones people shrug off. Steady hands and discipline always beat big talk and short cuts. I mean, his story taught me that leadership is less about charisma and more about steady results. In reality, nobody remembers the flash if you cannot pay payroll.

Guillermo Triana, Founder and CEO, PEO-Marketplace.com

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Wright Brothers’ Quiet Persistence Inspires Cabinet Craftsmanship

One biography that shaped how I think about work and leadership is The Wright Brothers by David McCullough. Their story is simple in a way: two brothers from Dayton who built bicycles and tinkered with ideas that nobody else believed in at the time. 

That book changed how I look at both my shop and my crew. The Wright brothers reminded me that real progress happens in quiet places, far from the spotlight, where people stick with a problem until it gives way. At Cabinets Plus, I keep my operation steady and honest, never trading shortcuts for quick wins. My favorite line from that book is, “No bird soars in a calm,” and that still hangs in our break room as a reminder that a little turbulence just means you are flying.

John Washer, Owner, Cabinets Plus

About ‘What Experts Read’

In our unique series, ‘What Experts Read,’ discover the literary inspirations and must-reads of thought leaders and industry experts. Each article highlights the books that have impacted the viewpoints, tactics, and success of successful entrepreneurs and seasoned leaders in their respective areas.

Discover a wide range of sectors, including technology, finance, healthcare, and more, as professionals share their best book suggestions and talk about the significant influence these reads have had on their careers. Discover priceless information, expand your horizons, and gain insightful knowledge from experts at the forefront of their fields.

‘What Experts Read’ is an insightful look at the relationship between knowledge, experience, and the written word, and it may be of interest to anybody looking for motivation, strategic advice, or just to learn more about the reading preferences of prominent industry figures. Join us for this insightful tour of the most important leaders’ bookshelves of today.

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By Esperanza Pretila

Award-winning author, MBA, founder of award-winning micro businesses, people-centric professional, former naval officer, lady cavalier, book reviewer, blogger, sports dummy, music lover, ex phone photographer, fan mum, dear wife, wayfarer, human, and believer.

One thought on “What Experts Read: Career-Changing Biographies That Shaped Leadership Styles”
  1. This is an exceptionally insightful and well-curated piece on the art and science of leadership. 👏

    Each section beautifully illustrates how true leadership is not confined to authority or expertise but is instead shaped by character, empathy, and the willingness to grow through experience. The inclusion of diverse perspectives—from crisis leadership and law enforcement to real estate collaboration and ethical entrepreneurship—makes the article both inspiring and practical.

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