Penguin Classics hardcover with red cover

I lost my Penguin Classics hardcover mystery novel yesterday around 3pm near the courthouse on East High Ave in New Philadelphia, Tuscarawas County. It's a 320-page hardcover with a red cover, gold foil title on the spine, and a green ribbon bookmark sticking out. The dust jacket is a bit curled at the corners and there's a small coffee stain on the bottom edge. This book was a gift from my grandmother and means a lot to me; it has sentimental value and I really need it back, so if anyone found it, I'd be grateful to get it back!