Blue Penguin Classics paperback mystery novel

I found a blue Penguin Classics paperback mystery novel this morning around 9:30am in the parking lot behind Osage Beach Outlet Marketplace on Route 54. The cover is a bright blue with a small lighthouse illustration, and there’s a coffee ring on the back cover. Inside, page 142 is dog-eared and there’s a handwritten note in the margin: 'For Sam, birthday 2022.' The spine’s a little creased, but the rest of the book looks readable. If you’ve lost it, I’d really like to get it back to you—maybe you were reading along the Lake of the Ozarks lakeside trail near Grand Glaize Dock when you last had it.