So, Hi  !
I actually discover you with this video and I agree with you (even If I read it) Book of Atlantic is a great arc of this anime/manga.  If you want to see more I recommand to see season 1 and 3, the second is hated by he fans for some reasons that I won’t say for spoilers. You started with a great point, in case Ciel isn’t prounonce Seal, it’s sky in french (I’m french so I know what I’m saying, and so I apologize for my English). Good sense of détails with your background (posters, Grell on the book shelf) ! I hope you will have success