I found the Udemy CKA / CKAD certification courses to be good, even if you are not interested in certification. Most of the books I have come across have been

I found the Udemy CKA / CKAD certification courses to be good, even if you are not interested in certification. Most of the books I have come across have been good as well but Kubernetes moves pretty fast so some of the YAML files might need to have slight tweaks.