She is publishing a novel for adults, and her publisher is having a difficult time deciding how to market her.
This Ad Age article discusses the dilemma.
Little Brown considers her an "unknown entity" as a novelist for adults.
Little Brown, you've got to be kidding me. You think that publishing a J.K. Rowling book is taking a giant risk? This is a perfect example of why I hate the publishing industry, and why I decided to start my own company instead of dealing with you people.