Reviewed after 11 chapters:
Very good novel :)
One thing to note, there is a lot of jumping around in the early chapter. However, it doesn't matter, as the author has done a great job making it easy to follow along without getting confused. Also, from my untrained eye, I didn't notice any grammar problems.
I hope to see more of Samael. I was glad to start getting some backstory on him and I'm very interested to know more about the executioner blades.
Keep up the excellent work author, don't drop!