This is why she's simply the best.
J.K. Rowling isn't one to put a lot of faith in doubters.
Before her Harry Potter books sold hundreds of millions of copies worldwide, she had to wade through "loads" of rejection — sometimes from some unfriendly sources. The first time she sent her Harry Potter manuscript to a literary agent, the agent responded with a simple but harsh, "My list is full," and kept the folder Rowling sent her work in.
"I really minded about the folder," Rowling...