I like your approach of asking about good references.
There are a number of good references on the subject. Kraus, Silver, Jasik (now Volakis) and the like. Many people like Balanis as a starting point. They all have discussions of the various antenna parameters. Surprisingly, Introduction to Airborne Radar, Stimson is another good reference. Radars really depend on antennas so any book that is trying to make sense of radars has to do a good job of describing antennas first. Introduction to Electromagnetic Compatibility, Paul might also be helpful.