THE DIABOLIC is a fairly brutal YA science fiction novel. Sci fi is a genre that I have always struggled with, but I found THE DIABOLIC to be a fairly easy read to get into, despite overall mixed feelings. 
 The World 
 The world in this novel is pretty complex; there are different religions, classes of people, and government hierarchy. I think this world had the potential to be very satisfying and involved, but it wasn't totally fleshed out. There were Senators, Grandees, Emperors, Servitors, Diabolics, and other terms that you sort of had to figure out for yourself, which was a huge feat in the beginning of the book. 
 There was a lack of history as well, I wanted to know how all these systems and norms were established but that was missing. Also the space setting, which could have been the novel's shining star (no pun intended), wasn't even used that much. 
 The Characters 
 Nemesis, our main character, is a Diabolic, a genetically engineered humanoid meant to protect one person with her whole existence. However, certain events lead Nemesis into a situation that she was never trained for and we get to see her gradually come to terms with who she is. Nemesis was definitely one of the stronger features of the book. She doesn't believe she can feel or has a soul, but as she forges different connections she realizes that might not be the case. This transition is a good addition to the book and it really added to the character development. 
 The side characters were quite interesting as well, especially since all of them had sides that were not immediately revealed to the reader, making for some interesting twists. In terms of romance, I shipped the ship but I thought things escalated a little too fast. 
 The Writing 
 I lost track of the pages when reading THE DIABOLIC so for a somewhat large novel, I think it had good pacing. There were a few areas were I thought some things were a little drawn out or lacked clear direction, but the rest kept a relatively fast pace without being rushed. I do have to say that some bits felt really polished when others did not, making for sections that did not have a cohesive feel with odd writing or dialogue, but there isn't too much else to fault. 
 Overall, I would recommend this to fans of YA science fiction and anyone interested in the Diabolic concept because the discussion of humanity makes for an interesting and thought-provoking read.