I mean, all writers have their inspiration, their muse. If they aren't compelled than the Schreiben feels forced and unnatural. But, I would think the Fans would be the inspiration? The Fans that have gotten Du to this point? That's just my take.
Stephenie writes "I hope Du all are enjoying your holidays! Just a quick update about a book—arriving in bookstores tomorrow!—that I'm very excited about: The Lonely Hearts Club Von Elizabeth Eulberg.