Chapter 1, Kubernetes Design Patterns, will help you to understand Kubernetes patterns which would be presented with the examples from Kubernetes itself and external applications.
Chapter 2, Kubernetes Client Libraries, will help you to cover accessing Kubernetes API with raw HTTP queries to complex libraries with both in-cluster and out-cluster examples.
Chapter 3, Kubernetes Extensions, will present extension capabilities of Kubernetes with custom resource definitions, custom controllers, dynamic admission controllers, and custom schedulers.