Lost paperback copy of 'The Great Gatsby' with a blue cover in a park in Southern Illinois.

I lost my favorite copy of 'The Great Gatsby' while walking through a park in Southern Illinois last week. It's a paperback edition with a blue cover, and I remember taking it out to read on a bench. I was so engrossed in the story that I forgot to pack it back up when I left. If anyone has found it, I would really appreciate getting it back!