Blue Penguin Essentials mystery paperback with red bookmark

I lost my blue Penguin Essentials mystery paperback yesterday around 3:15pm near the coffee shop on Main Street in Dayton's Oregon District. It's a 320-page trade paperback with a red ribbon bookmark peeking out and a coffee ring stain on the back cover. The cover art is a moody teal-blue with a small 'Staff Pick' sticker on the inside flap. It was a gift from my aunt and carries a lot of sentimental value; I really need it back to finish the last few chapters. If you found it, please drop me a note here — I’d be incredibly grateful to get it back.