u/Content_Flower_3999

I don’t remember the plot or genre at all, but here’s what I can remember:
-Fiction
-It had cards (cant remember what of) that you get from like a flap on the back of the front cover
-the book cover has an eye illustration, mostly color green&black, and had the number 13(?)
-part of a series
-published before 2014

I might’ve misremembered some details but the cards is the most telling information.