I believe this was the first of the Deryni novels that i read, so perhaps my fondness for the book stems from that. I knew nothing about the Deryni, the history of the Eleven Kingdoms, or the Regency; but this world drew me in and kept me there.
If you have read any of the Deryni novels and have looked at the Haldane lineage, you know how long Javan lived and served as king. From the title "King Javan's Year", you have an idea what is going to happen.
In so many fantasy novels, the main characters are treated lightly and make it through and they save the day. In the Deryni novels, things are much darker for the protagonists and what surprised me was how vicious things were against Javan. Through all of this darkness, the light of who Javan is shines through and I really cared what happened to him and was somewhat upset at how this ended...
I suppose that is the mark of a good writer, that you can be drawn into the the world and care about the characters. The characters i care the most about, though, are those who are earliest in the timeline (Joram, Evaine, Camber, Javan, etc)...i really hope Katherine Kurtz returns to the earlier times of the Eleven Kingdoms. Until that day, i will continue to read about Camber and his children.