Why was Harry Potter a Bestseller?

In this book, I have analyzed why Harry Potter turned out to be the best best-seller of all ages. I have analyzed topics ranging from the writing style to the story to the fantasy as well as the effect of Rowling's personal life on the success of the book.

Hundreds of thousands are children fantasy books are released yet not even one comes near Harry Potter in terms of revenue. I have analyzed all of it in order for everyone to know the secrets behind the outrageous success of Harry Potter.