A situation any author would pay their first born to get into: Someone publish an unofficial companion book based on your work. First, it's bound to be a matter of money (so the companion book will still be released); second, free publicity while one can still innocently ask "why is everything about me?" and third, helps with the sales (both the original work AND the unofficial companion) JKR annoys me lately... Probably due to the failure to impress at the end of HP7.
