alt.publish.books - join
For independent book publishers
Low activity, 204 subscribers, Usenet

Self-Publishing (Independent Publishing) - join
A discussion of the serious business of publishing books. Topics include print on demand (POD) publishing, traditional self-publishing, independent publishing, e-Books, audiobooks, book marketing, networking, and more. New Members are moderated. Flaming and/or SPAM are not tolerated.
Low activity, 227 members, moderated, restricted

rec.arts.sf.composition - join
The writing and publishing of speculative fiction.
High activity, 973 subscribers, Usenet