Paperback Writer (author Lynn Viehl) has posted an excellent article on writing-for-hire. It’s great meat-and-potatoes publishing info.
A publisher, packager or franchise that wants a book or books written
to their specifications solicits and hires a novelist to write them.
The writer is contracted, usually for a flat fee. The assignment can be
anything from a vague idea to a complete package including specific
plots, characters, settings, maps, themes and so forth. Wordcounts,
page counts and certain creative restrictions (like sexual content) are
also generally spelled out.To break into writer-for-hire
work, you usually have to audition, which is a lot like pitching one of
your own novels, or the publisher may seek you out based on your
published work or a recommendation from someone who knows you and your
work…
I’m a writer-for-hire on DIAGNOSIS MURDER and MONK books. I got the DM job because I was an exec producer on the show and the publisher was aware that I was a novelist, too. So they came to me with an offer. The MONK books are being done by the same publisher…and I’ve worked on that show, too. Writing-for-hire is a huge business and I know a lot of writers who make their living almost entirely on franchise work…