Could someone link me or if possible if there’s a book for it.
See if those are what your looking for
But I’m looking for a detailed backstory of angels and demons
You’re asking about information on how each individual demon and angel lives their lives? Lol there’s a big plot hole in this.
Your best bet is probably to look up each angel or demons history then. I can tag a couple of people who are more knowledgeable than i am to see if they can help.
Honestly it would be best you could evoke them or project to realm they reside in and ask them.
Basically this and some research otherwise you’ll just get regurgitated nonsense that demons are just the Gods under another name or angels are all children of Yahweh but forget the existence of erote angels and Ma’ati angels and so forth.
Trivial knowledge is very dangerous if not combined with practice, even then good luck finding what is true or not.
Ok yes please.