I'm looking for a book, can you please help it would mean a lot

I'm looking for a book and I can remember the name,
so this girl she wears black and white and her parents are like super rich, but she was an accident so her mom doesn't necessarily like her and her dad is like ehhhh, she meets this reporter dude that's like also troll I think he's like fuzzy though, and they solve a mystery together and like there's magic involved i think and there's a lot of riddles and there's something to do with Zs like either the title starts with a Z or the girl's name is Zoe.