I only vaguely remember this but I know it wasn't a dream because my mom helped me read out loud with it. I only remember some details but I know it had some art in it, it had an Addams family vibe to it, the little girl was raised by spiders? or ghosts? or something similar? And one of the books was about her first day at a real school with normal kids?
And all I remember is that since she was raised like "goth" and creepy she didn't interact with anyone very well because everyone thought she was scary but I think she also thought they were scary? and I know there were lots of "scary" puns like "scream cheese". I'm so sorry I know this isn't a lot of detail but that was a long time ago when I read it.
Also I vaguely remember most of the color used only being grey and purple.