There is no magic formula for becoming a bestseller, short of building a brand and engaging platform over the course of many years. Selling thousands of copies of a book each week is no small task - and actually quite rare in the book publishing industry. But that doesn't mean you should not strive for this goal! There are some critical elements authors should be aware of in terms of the complexities of the best seller lists: https://www.vox.com/culture/2017/9/13/16257084/bestseller-lists-explained