This is a fantasy book, and seemingly there have been a number in the series before it. I am not sure how much before is relevant to this story, as there are many references to things I could not understand, but since the predominant tool in this book is magic, I guess there is an inevitability about that. The book seems to have two major strands, one for "King Richard" and one for some other assorted dragoneers, who are elsewhere. There are monsters, wizards, battles where they throw spells at each other or use defensive spells, and for me, since I have no idea what such a spell would do until told, I found there to be surprisingly little tension.
The book is well-written at the sentence level, but I found that on a larger scale, the structure tended to be a sequence of events that as far as I could tell were not linking entirely into a whole, This may be because of a serious flaw. I am 72% through the kindle edition, and it is not a large book, when it all stops and says "to be continued" and it continues then with a small novella about something else but related. Sorry, but this annoys me. Why not finish the story? As it is, I have no idea where this is going, and I am far from convinced I want to find out.