Iron Gold is the fourth book in the Red Rising series which I originally thought was intended to be a trilogy. It has been a while since I read the third book so quite a bit of the names and events caused some head scratching as to exactly who was who.
Normally in series books, the author will spent way too much time doing a recap of what happened in the previous book(s). I usually hate this because either my memory is good or I read the books so close together that I haven't had time to forget yet. In this book I felt he did not do much of a recap at all, so I was left trying to remember exactly who knew who from where. It does not help that most of the names are ridiculous compound ancient greek/roman mashups.
Overall this book was good, not as good as some of the others, but still a fun read. I am calling it just okay because it was laborious at times. He could have trimmed at least 100 pages and not lost anything of substance. Moreover, it is definitely a setup for the next book which was disappointing at the end.