All Eve's Hallows — Dean Wesley Smith

Dragons, giants and goblins are all around us, magically hidden within human society as they and a whole bestiary of fantastic creatures have been for a thousand years. But when conflicts with humanity arise, someone has to keep the peace between the supernatural beings and the unsuspecting mortals who long ago drove everything magical into hiding―and then forgot about them. The City Knights is the thousand-year-old top-secret organization charged with protecting humanity from these mystic entities and vice Versa.