All the books in this trilogy are supposed to be stand alone, but I think this one needs to be read with background information from at least one of the other two. It occurs a generation after Demoniac Dance and the children in that story have grown up, some even having children of their own.
It's hard to say much about this story without giving spoilers for the previous one, so if you haven't read Demoniac Dance, you might want to read that one first before finishing this review.
Khemael, the main character, is mostly human looking in appearance, except for his large, dragon-like wings. If he allows a human to see him, there's an equal chance of being mistaken for an angel or a demon. He enjoys flying freely and this causes problems, because of course goblins are supposed to stay out of sight and one of the characters from the previous novel who is a dragon also breaks a few rules by going out to fly.
The ability comes in handy when a tribe of wild men move towards the old city and present a danger to the human settlements there. Old enemies have to cooperate once again against a common foe.
This had some very dramatic scenes in it and wrapped the series as a whole up very neatly. It's definitely one of my favourite series and I highly recommend it to any Fantasy readers. If you read on Kindle, the complete series in one volume periodically goes on sale very cheaply and it's just called The Goblin Trilogy so keep an eye out for it.
I'm partly sad that the ending worked so well because that means no more books in this world, unless the author does a parallel timeline series like Anne McCaffrey and others have done.