Can anyone recommend reference books for ArcGIS Enterprise? The Esri Press website doesn't have anything specific to enterprise. Quick Amazon search returns only these two promising options:
Mastering ArcGIS Enterprise Administration
&
Getting to Know ArcGIS Enterprise
This second one is published by Esri Press, but (as mentioned above) is not available on the Esri Press website. Why would Esri Press publish this book and not sell it itself?