Lost copy of 'The Great Gatsby' with a blue cover and name inside, lost at La Frontera Park in Central, SD.

I lost my copy of 'The Great Gatsby' while sitting on a bench at La Frontera Park in Central SD. It has a blue cover and my name written on the inside cover. I realized it was missing after I left the park to go shopping, and I've been hoping to find it since I really love that book.