This is just an idle thought that might come in useful at some point. Say you publish or self-publish a book that's first in a series and you want to assure prospective readers that the series is completely written, though not all published yet, and that they're not going to left indefinitely hanging like fans of various bearded fantasy authors have been in the past 15 years. What might be the best way of doing this on the cover, so a reader can get instant assurance rather than having to look inside or on a website? Has anyone seen a cover that does this? (Granted, having a complete series written before the first book comes out is probably very rare.)