I have often used the words "world-building" and "mythology" interchangeably to mean the magic an author brings to their book. In DARK KISS, Rowen's magic is definitively mythology, as her characters inhabit a world that is almost featureless. Other than a school filled with between class hallways and a club where Samantha encounters the paranormal for the first time, this book takes place entirely in the characters' conversations.
Like Smallville or Roswell, DARK KISS is an intimate portrayal of a teen dealing with the otherworldly. Despite how often the word gets thrown around, Samantha's workman-like exploration of the world of angels and demons didn't strike me as particularly "special". I think I would have liked this story more if it had been in television, as envisioning the people carrying on all of these conversations would have added extra depth to the experience. Though Samantha and her companions were neither a surprise nor a disappointment, their relationships and mythology was enough to keep things interesting.