So Bands of Mourning is out today, which was expected but still crazy, since he wrote it in secret during the Shadows of Self process. To make things more absurd, apparently he stealth-wrote another Mistborn novella that released today.

I cannot even begin to fathom the production level he has to maintain. I finished another novel last summer, and I was burnt out for about four months after that. Sanderson just goes and writes multiple novels at once and ignores the concepts of rest and recovery.