There are two user guides for those interested in Charmed OpenStack.
Charm guide
The primary source of information is the OpenStack Charm Guide. It is hosted on the upstream OpenStack documentation site of docs.openstack.org. It is under version control and its repository is here.
Deployment guide
The OpenStack Charms Deployment Guide is a step-by-step guide for deploying OpenStack with charms. It is hosted on the upstream OpenStack documentation site of docs.openstack.org. It is under version control and its repository is here.