Blue paperback found near Main Street, Pierre

Found a blue paperback this afternoon around 2:45pm behind the Pierre Public Library on Main Street. It's a pocket-sized mystery novel with a bright blue cover and a white title that stands out. The spine is cracked and there's a coffee ring on the back cover; inside, a small green Post-it tucked between the pages says 'Jamie' in neat handwriting. The pages are dog-eared from a few good reads, but it's otherwise in decent condition. If this is yours or you recognize the note, I'm happy to reunite it with you.