This fell out of one of my books a couple of days ago, as I was unboxing and reshelving them. I think it might have been Sébastien Japrisot’s A Very Long Engagement. The bookmark is from the San Francisco Mystery Bookstore, which, alas, is no more.
Floating below the Golden Gate, you could see a blonde wig and a crimson scarf. The perfect place for a tragic ending.
That would make a great opening for a story. I wonder where it’s from.
And by the way: A Very Long Engagement is a very good book.