Conceptually done before, but then again what hasn't been done before in the supernatural genre. It could have been a lot better, but failed to bring the money to the bank in the end.Not sure if I can put my finger on what was wrong. It seemed a little disjointed at times, which meant it didn't flow evenly. The characters were underdeveloped and that was a shame. Lee has created a strong female and male lead with a lot of potential, so perhaps that is something we will see in the next book.Some of the sentence structure appeared to a tad off at times, perhaps missing a comma here and there.One of the things that I felt was a complete contradiction, was the fact that the main character watches a human get drained, feels nothing and then a few pages later she is off helping individuals, who are in danger of being drained. Go figure?However that is plot related and completely subjective to each reader.Last but not least, I didn't think writing in first person did the book any favours.I liked some of this authors ideas so there will possibly be a next time.