"Self pubbers" is a short term for "self-publishers." It refers to individuals who choose to publish their own work, such as books, without the involvement of traditional publishing companies. Full definition
In fact, one thread has a listing of different artists that that particular self pubber used for her books - & heard about others from other writers. (jakonrath.blogspot.ru)
It opens up the world for all of us, and that's in part to self pubbers like yourself. (rmfw.org)
That of course makes us self pubbers cranky but when you think about the purpose of the LCCN it makes sense. (authorimprints.com)