Lost copy of 'The Great Gatsby' with a distinct blue cover left on a bench near the Griffith Observatory in Griffith Park.

I lost my copy of 'The Great Gatsby' with a distinct blue cover while sitting in Griffith Park last Saturday. I was reading it on a bench near the Observatory, and when I got up to take a walk, I left it behind. If anyone finds it, I would be really grateful to have it back!