Lost paperback edition of 'The Great Gatsby' with personal notes near the river park in San Angelo.

I lost my beloved paperback edition of 'The Great Gatsby' while walking my dog in the park near the river in San Angelo. I set it down for a moment to tie his leash, and when I looked back, it was gone. It's a bit worn, but has some personal notes in the margins. I'd love to get it back!