The book stands alone but would be better if Shadow Raiders had been read first. A distained portion of the population decides to get even for past wrongs.
This is a well crafted world. A back story would have made the book better. The main characters are nicely done and likeable. The Trundlers are air borne gypsies and Stephano is a dragonless dragon rider.
The events that they entertain surround the disgruntled Bottom Dwellers. The conflict with the Bottom Dweller is driving former adversaries into begrudging cooperation.
It is a good story and I recommend it but I do strongly recommend reading the first book first.
Web Site: http://www.margaretweis.com/
This book may have been received free of charge from a publisher or a publicist. That will NEVER have a bearing on my recommendations.