I have a subscription to Safari books and most ESXi books cover both cli and GUI but more the GUI. That is something I was also looking for and I ended up spending time going through several books and basically grabbing information and creating my own set of notes. You will probably be better off looking for vSphere Powercli books and learning to create your own scripts which I found to be more practical in most environments I have been in. I like "Learning Powercli (by:Robert van den Nieuwendijk) and PowerCLI Cookbook(by: Philip Sellers)". There might be better ones but those worked well for me.