The Kubernetes project is an open source effort, so there is a broad community of contributors and enthusiasts. One great resource in order to find more assistance is the Kubernetes Slack channel: http://slack.kubernetes.io/.
There is also a Kubernetes group on Google groups. You can join it at https://groups.google.com/forum/#!forum/kubernetes-users.
If you enjoyed this book, you can find more of my articles, how-tos, and various musings on my blogs and Twitter page: