Blue hardcover mystery novel with bookmark

I lost my blue hardcover mystery novel yesterday around 3pm near the Starbucks on Main Street in El Centro, Imperial County. The dust jacket is creased along the top edge and the spine shows a bit of wear, with a teal ribbon bookmark sticking out between pages. On the back cover there's a small hand-drawn sticker that reads 'Sunrise Readers Club' and a faint coffee ring near the title page. This book is sentimental—it was a gift from my grandmother and I really need it back. If you find it around Imperial County, drop me a note in the app.