The book was a good start-but there were areas that could have been improved. First-the romance needed to be expanded. Second-as others have mentioned-the author tend to quickly jump from one important event to another, all the while leaving some events that needed more discussion out. Finally-there are aspects of the "underground" world I find implausible-like the fact that denizens of certain areas spend great quantities of time wading through raw sewage but seem to always be able to clean up easily as well as not get deathly ill from this? Also nothing is mentioned about how all these creatures find food, clean water, etc.
All in all, Queene of Light was enjoyable enough that I'll try the next book in the series.