MSI Press Blog

  San Juan Books is the hybrid division of MSI Press LLC. It allows first-time writers to become published in a traditional way through the reduction of risk by sharing publication costs. All other publishing features are traditional in nature, and most SJB authors go on to be offered traditional contracts for their subsequent books. SJB publications are available as paperback, hard cover, and e-book versions. SJB authors' books very much hold their own against their contemporaries in the traditional publishing division. Indeed, a number of them have outsold their traditional compatriots. Today, San Juan Books presents author Brittany Renz. Brittany Renz is a successful personal trainer and mother in Hollister, California. A popular trainer with a very large, stable clientele, she trains together with her family, as well as coaching others. After years of people asking her how she does it all, she finally decided to take her experience and share it with the world. To see more posts...

  Coming soon! Watch for it!  Grandma's Ninja Training Diary  (Leaver and Renz) Grandma’s Ninja Training Diary  is the inspiring true story of a 70-year-old grandmother who dares to dream big—by training for  American Ninja Warrior . Teaming up with coach and trainer Brittany Renz, she embarks on a three-year journey to build strength, resilience, flexibility, balance, and endurance—starting from scratch. Told in a dynamic mix of diary entries, coaching insights, and behind-the-scenes reflections, this book chronicles the ups and downs of late-in-life athletic training. From gym workouts to rock climbing, yoga to injury recovery, sleep to mindset—every aspect of the transformation is explored with honesty and humor. Grandma shares what she’s learning; Coach Brittany explains why she’s right—or wrong. Together, they offer a realistic, encouraging look at what it takes to pursue an extraordinary goal at any age. Part training manual, part motivational memoir,...

  Coming soon! Watch for it!  Grandma's Ninja Training Diary  (Leaver and Renz) Grandma’s Ninja Training Diary  is the inspiring true story of a 70-year-old grandmother who dares to dream big—by training for  American Ninja Warrior . Teaming up with coach and trainer Brittany Renz, she embarks on a three-year journey to build strength, resilience, flexibility, balance, and endurance—starting from scratch. Told in a dynamic mix of diary entries, coaching insights, and behind-the-scenes reflections, this book chronicles the ups and downs of late-in-life athletic training. From gym workouts to rock climbing, yoga to injury recovery, sleep to mindset—every aspect of the transformation is explored with honesty and humor. Grandma shares what she’s learning; Coach Brittany explains why she’s right—or wrong. Together, they offer a realistic, encouraging look at what it takes to pursue an extraordinary goal at any age. Part training manual, part motivational memoir,...

  August 15 has long marked moments of transformation—India’s independence, Japan’s surrender in WWII, and the opening of the Panama Canal. These events remind us that movement, whether geopolitical or personal, reshapes the world. In honor of National Wellness Month , we spotlight movement not as routine gym culture, but as resilience in the face of challenge. At MSI Press, we publish stories that redefine what fitness looks like—across decades, circumstances, and limitations. These four titles prove that wellness isn’t about perfection. It’s about motion when motion feels improbable: 🚴‍♂️ Racing Against Time by Jeffrey Weiss At 61, Weiss placed in a triathlon—after 11 years of Ironman races, ultramarathons, and long-distance cycling. (Yes, he started in late mid-life.) His story is a masterclass in fitness over 60, proving that age is no barrier to endurance. 🥋 Grandma’s Ninja Training Diary by Leaver & Renz Fitness over 70? Absolutely. This diary-style narrative ch...

  Coming soon! Watch for it!  Grandma's Ninja Training Diary  (Leaver and Renz) Grandma’s Ninja Training Diary  is the inspiring true story of a 70-year-old grandmother who dares to dream big—by training for  American Ninja Warrior . Teaming up with coach and trainer Brittany Renz, she embarks on a three-year journey to build strength, resilience, flexibility, balance, and endurance—starting from scratch. Told in a dynamic mix of diary entries, coaching insights, and behind-the-scenes reflections, this book chronicles the ups and downs of late-in-life athletic training. From gym workouts to rock climbing, yoga to injury recovery, sleep to mindset—every aspect of the transformation is explored with honesty and humor. Grandma shares what she’s learning; Coach Brittany explains why she’s right—or wrong. Together, they offer a realistic, encouraging look at what it takes to pursue an extraordinary goal at any age. Part training manual, part motivational memoir,...