One of my favorite things on DVDs and Blurays, are the extras. All the neat bits of production and pre-production art, the make up applications and the how-to, behind-the-scenes clips.
Books should have that too.
Authors spend a great deal fo research on their novels. They have to plot out characters' backstories, they have to read up on things they aren't experts on, so they'll be able to described them sufficiently. That's a lot of work, that a reader never gets to see.
But now we're in an age of eBooks and webpages for eBooks. So why not start showing some of that behind the scenes work off?
Here's my first behind the scene peek: the crest for Detachment 1039, as described in Mythical