Blue Penguin Classics paperback with seashell doodle

I lost a Penguin Classics paperback called 'Shoreline Secrets' yesterday around 3pm. It's a medium-sized blue cover, about 320 pages, with a slightly creased spine from travel. There's a Sea Breeze Books sticker on the inside front page and a faint pencil seashell doodle in the corner of page 22. The book has sentimental value—it's the last gift I bought for my grandmother before she passed, which makes it really important to get back. I think I might have left it near the Biloxi Lighthouse on Beach Boulevard, possibly near the souvenir stand or the map display by the promenade. If anyone found it, please reach out here; I’d really appreciate it.