That's so awesome. If more people use steemit professionally, it can really be a game-changer. I personally decided to use steemit to post my first novel a chapter at a time and it would be cool to see some mainstream authors do the same.
I just wrote about my experience here.
My main concern with posting the books themselves is whether or not it will impact my ability to use Amazon's KU, which has been a huge part of my income this past year.