You can come back to them again and again, finding new insights and strategies for wherever you are on your hero’s journey. Best books for fitness writing . I love and recommend this book because it changes the way you see personal and professional relationships and reminds you that human beings, more than processes, drive success. This book focuses on the importance of giving as a professional—and how adding value to the others’ careers can ultimately help you to be successful yourself. Best Personal Training Books . ... Identifying your strengths is a crucial step in your professional development… Read Next. From Dale Carnegie to Paulo Coelho and from Brene Brown to Eckhart Tolle, these 11 authors produced incredibly valuable work. 10 Best Books in Psychology to Learn the Forces That Drive You. Best Personal Loans. ... 11 Career Development Books To Read Now That You’re Staying Home All Day. What are the best self-help books of all time? With over 15 million copies sold, this best-selling book was first published in 1936, but the lessons in it still hold true today and it's considered a must-read for career development. Ignite the Fire: The Secrets to Building a Successful Personal Training Career — Jonathan Goodman. All of the best personal development books are courses in themselves. Which self-development concepts rise above trends to provide the ultimate knowledge to help people become the best versions of themselves? Ignite provides a clear road map to starting your personal training career, building your clientele, establishing your reputation, and boosting your income.