“where’s the playbook? there’s nothing that describes how to deal with the issues of growing a company”. Scaling Up by Verne Harnish is the playbook. It details exactly what you must do as you grow past Start Up into Scale Up. It outlines the barriers to growth during this phase and how to overcome them, and provides practical tools to master the areas of People, Strategy, Execution and Cash.
Watch a short overview of the book here https://youtu.be/naYurMoPjGA