Below are a number of resources that we recommend in your studies on Earth Station technology and satellite communications generally.
Textbooks
The best places to look for textbooks is Abebooks, where you can often buy good quality second-hand copies, and of course, Amazon. These textbooks are often very expensive for the latest editions, but older editions are still often worth buying, as the fundamental principles have not changed.
(Note that we do not receive any financial benefit from any of these book purchases you may make from any sellers)