Vlog: On Selling a Book on Proposal

What does selling a book on proposal mean? Today I'm talking about the less common—but still very real—method of selling a novel.


RELATED LINKS: 

How to Get a Book Deal (vlog)How to Get an Agent (vlog)How to Pitch Your Book (vlog)On (Finally) Drafting a Sequel
Any questions about the proposal process? I'd be happy to answer them below. :) 
Twitter-sized bite:

How does a book or series sell on proposal? Author @Ava_Jae shares her experience in today's vlog. #publishing (Click to tweet)