Blue hardcover detective novel found near Belfast Central Library

I found a blue hardcover detective novel this afternoon around 3:15pm on the pavement outside the Grand Opera House on Great Victoria Street, Belfast. It's a cloth-bound edition with gold lettering on the spine and a faded red bookmark ribbon sticking out of page 142. The cover has a small coffee stain near the corner, and there's a handwritten note on the inside flap with the initials 'L.M.' It feels like someone’s cherished copy, and it would mean a lot to get it back to its owner. If this is yours, I can arrange a quick meetup at a nearby cafe or outside the library.