Key elements for writing a book include strong character development in fiction and accuracy with a personal voice in non-fiction. Engaging plots often rely on well-developed characters, although some stories can succeed with minimal character depth, as exemplified by Ambrose Bierce's work. In non-fiction, incorporating personality and emotion is crucial to avoid dry factual accounts. The discussion highlights the importance of writing style, with some authors, like Dan Brown, captivating readers despite perceived weaknesses in plot. There is also mention of the appeal of short chapters and suspenseful elements in modern writing. Additionally, the potential for writing science fiction based on real physics is noted, along with experiences in poetry publication. Resources for aspiring writers, including online forums and local writing groups, are suggested for those seeking guidance in the writing process.