Hardcover mystery novel with gold spine, lost

Hey, I lost my hardcover mystery novel yesterday afternoon around 3pm near East Oregon Public Library on East Oak Street, by the steps near the fountain. It's a first edition hardcover of The Silent Room with a black cover and a gold spine, and the page edges got a coffee ring stain from Tuesday's cafe visit. Inside, there's a lavender bookmark pressed between chapters. It means a lot to me because it was a gift from my grandmother and I scribbled notes in the margins about the clues I couldn't put down. If anyone found it, I'd really appreciate getting it back—I am worried about the notes and the memory attached to it.