A. Lynch, whoever that author is, has a nice snappy way with words. Basically, this is a 'coming of age as a vampire' story. The MC's friends, all in high school, are paranormals of many types, from sirens to gargoyles. 
 This YA story ends with the MC (Rel) beginning to get a grasp of her more-than-normal-vampire powers and facing her first real challenge from humans who want to kill all the monsters. While the immediate story is tied up (that is, no cliffhanger), her mastery of her talents is at a new apprentice level. The author claims to like epic fantasy, so perhaps there will be sequels. I would have appreciated fuller development of Rel's education in using her powers in this book. 
 Jon 
 Disclaimer: I don't known the author. I bought the book on KU. Great cover ... not the usual fantasy cliches.