Being an experienced author, what do you generally have to submit to a publisher to get your book published?

My experience now, 48 published novels, and that of the beginning novelist are VERY different. Typically an agent (it’s critical to have an agent) want to see a completed outline and three or four really well-written chapters. The competition out there is fierce. My agencies receives 20,000 unsolicited manuscripts a year–with thousands of solicited manuscripts to read on top of that.