It started like good urban fantasy book. The heroine was likeable, plot was interesting and there was good mystery. There also was some humor in the beginning. 
 But the more I was reading, the more depressing this book was becoming. Soon all the good thing that were in the beginning became grim and boring. 
 I also didn't like that author put in the story every mystical creature, that ever were mentioned in mythology. There were shape shifters, vampires, goblins, gremlins, gargoyles and so on.... It was confusing. And I couldn't stop wonder, how only 30 humans (10 triads) managed to keep this creatures existent from the rest of humanity? 
 I couldn't get myself finish the book. Nothing interesting there.