Blue Penguin Classics hardcover with red ribbon

I found a blue Penguin Classics hardcover mystery novel this morning around 9:15am near the Belgrade Theatre on Belgrade Square in Coventry. The cover is bright blue with gold lettering and the spine is a tad creased from prior reads. Inside, there’s a red silk bookmark sticking out between pages, and a small pencil doodle of a ship on the inside cover with a tiny date note tucked under the flap. The book seems in decent condition for a well-loved read. It feels like someone would be really glad to get it back, especially if it held sentimental value. If this is yours, please reach out so I can arrange returning it.