Let me first start this post by saying I know a little about book packaging, but purely from the outside in–through knowing authors who've done it as work-for-hire and people who worked at packaging houses and as a general "watcher of the industry" and articles that get written about it. None of that makes me an expert.
The most interesting thing about watching heads explode this morning on twitter over the new announcement that Amazon has reached licensing agreements with Alloy/WBs (with more in the works) to allow writers to sell fanfic set in the Vampire Diaries, Gossip Girl and Pretty Little Liars worlds through its new Kindle Worlds program was how few people immediately recognized these are all packaged properties. I have seen a lot of worry about the authors who created these characters getting money, and how the rights worked, and etc. etc. and I am reminded once again that lots of people–even savvy industry types–don't realize how prevalent packaging is in YA (and probably elsewhere too–I am most familiar with YA and so that's what I'm talking about here). People on twitter thought a post on the subject was a good idea, and so here one is. (Experts feel free to jump in the comments or send me an email if I've gotten something wrong or you feel there's something I missed that's important.)