Blue paperback mystery novel with dog-eared pages

I lost my blue paperback mystery novel yesterday around 3pm near the Walmart on 3rd Street in Colby, NW Kansas. It's a mass-market paperback, about 320 pages, with a bright royal-blue cover and a slightly creased spine. There's a small coffee ring on the back cover and a red fox bookmark tucked between pages 120 and 121. The inside cover has my initials 'PP' written in pencil, and a tiny note from a trip I took last spring scribbled on the first page. This book was a gift from my grandmother and has sentimental value to me; I really need it back. If anyone spots it in the Colby area and can return it, I’d be incredibly grateful.