Both (I'm the author). It covers Heroku from the ground up. I've had people of many different skill levels review the book, and so far its had extremely positiv

Both (I'm the author). It covers Heroku from the ground up. I've had people of many different skill levels review the book, and so far its had extremely positive feedback. If you're on the fence, send me an email (rdegges@gmail.com) and I'll give you a copy for free :)