In 'Write a Must-Read', A.J. Harper shares her expertise on writing nonfiction books that resonate with readers. The book is centered around the 'Reader First' philosophy, emphasizing the importance of understanding and addressing the needs, desires, and challenges of the ideal reader. Harper provides practical advice on identifying the ideal reader, crafting the Core Message, and using teaching points, stories, anecdotes, and case studies to serve the reader. The book also includes guidance on editing and the process of publishing and marketing.

This book introduces the concept of 'The Gap and The Gain', developed by Dan Sullivan, which helps high achievers understand why they are often unhappy despite their accomplishments. It explains that measuring oneself against an ideal (the Gap) leads to dissatisfaction, while measuring against past achievements (the Gain) fosters happiness, gratitude, and motivation. The book is a masterclass on positive psychology, healthy relationships, mental well-being, and high-performance, offering practical advice on how to shift focus to appreciate progress and achieve greater fulfillment and success.