The parallels to Vampire Academy are naturally unübersehrbar. I have read all the 6 volumes of the VA series of Michelle Read (+ 3 Bloodlines novels) and have long been looking for something similar had been, in Half-Blood I have found just that. Who should hang it, that should have the storyline a lot of parallels the books thus simply not continue.
However, those who want to move into an exciting and supernatural adventures on the Covenant to Half-Blood should definitely buy. Once in hand, you can put only schwerens heart from fingers it namely.