Lost dark green hardcover edition of 'The Great Gatsby' left on a park bench in Eastern, Colorado.

I lost my hardcover edition of 'The Great Gatsby' while I was walking my dog near the park in Eastern CO. I remember setting it down on a bench to clean up after him, and then I drove off without it. The book has a dark green cover and my name is written in the inside cover. It's very special to me, so I’d love to get it back.