I think it doubtful that I'll continue this series, because of a couple of things. I didn't like the route this book went and after finishing it I had to check the reviews for the rest of the books and unfortunately it was everything I feared.
I liked Beezle and Gabriel to a certain extent, but I really loathe Nathaniel, Azazel, Lucifer etc. And the whole hierarchy thing rubbed me the wrong way.