Blue hardcover Dune with yellow ribbon

I lost my blue hardcover copy of Dune by Frank Herbert yesterday around 3pm. It was in the Aurora area of Eastern Colorado, near the Aurora Mall on Sable Boulevard, by the coffee shop and the Barnes & Noble entrance. The book has a bright yellow ribbon bookmark, a slightly creased spine, and a small coffee stain on the back cover. It really matters to me—it's a gift from my grandmother and I’m hoping to get it back soon. If someone found it, please drop it off at the mall’s customer service desk or send me a message here so we can figure out a pickup time.