SOLVED. YA mystery; it is set in the past (flappers) and the protagonist is a girl who loves to party. She got sent to her uncles house/book store and then links of murder begin to occur that her and her uncle investigate. [s]

[Jill]

The book's cover from what I remember is dark blue with gold outlining and there was an eye on the middle bottom.

[Spockles]

The Diviners by LIbba Bray.

[Aspiring]

That's what I would have said!

[Jill]

Spockles wrote: " The Diviners by LIbba Bray."
That's what it is!! thank you!!!