There's an art to writing sequels and subsequent books — it's called effective promotion of your first book. (wiseinkblog.com)
• Increased sales of daily specials and signature dishes by 70 % through effective promotion strategies. (coverlettersandresume.com)
There is no clear answer as to whether audio or video is a more effective promotion tool because it all depends on the individual book. (thecreativepenn.com)