Scaling, Structure, and Growing as an Engineering Manager with Camille Fournier
blog.gitprime.com
blog.gitprime.com
The point about effective managers need to stay out of the details and don't solve their team's problems can't be overstated.
This is exactly holacracy, teal, and other so-called "flat" leadership models are so inefficient. The power structure is there whether it's visible or not. Ignore at your own peril.