Lost: paperback mystery novel

Yesterday around 3pm, I was reading a paperback mystery in a bench area outside the Wenatchee Public Library on Orondo Ave, and I think I left it there. It's a mid-sized paperback with a green cover, a slightly worn spine, and a blue ribbon bookmark peeking out at page 178. The back cover has a small coffee ring stain and a tiny crease along the bottom-right corner. The book was a gift from my grandmother, so it has sentimental value and I really need to get it back. If you found it, please email me at [email protected] and we can arrange a safe pickup near the library or another convenient spot in Wenatchee.