Rowling as a serial killer? A bit rich, and I am not sure how she would take that, but aside from the aesthetic debate about Potter, she is an incredibly lucky author. I have published and suffered well over twenty years, and I am still running this treadmill, lucky if I get in some online sci-fi penny zine even for a token amount. But Rowling went from being a welfare mother to a woman who is nearly a franchise unto herself. I admire her achievement. Don't know if I will ever find time for the books, but would enjoy doing her biography, seriously.
In the modern era hers is a rare feat, and her literary agent was no doubt a marketing genius.