Blue hardcover mystery novel with fox bookmark

I lost my blue hardcover mystery novel yesterday around 3pm. It's a Penguin Classics edition, about 350 pages, with a worn spine and a tiny coffee stain on the back; inside the cover there's a small orange fox doodle and a red ribbon bookmark protruding from the pages. I think I left it near the Starbucks on Olive Ave in the Tower District of Fresno after a quick sit-down, and I didn’t notice until I reached the bus stop. This book is sentimental—it's a gift from my grandmother—so I’d really appreciate getting it back if anyone found it.