Based on the HTML preview content, I would guess that the main topic of this article is likely "Best Selling Authors and Their Executive Training Webinars". This is a common format for articles highlighting successful authors, their books or series, and executive training programs they participate in.
Some notable examples of best-selling authors who have participated in executive training programs include J.K. Rowling, who has spoken about her experiences with leadership and entrepreneurship through the CEO Training Institute, and Stephen King, who has taught business courses at several universities.