ABANDONED. YA Historical Regency, Mystery. Man died while riding along cliffs. Girl has to marry well because they're secretly broke; tries to solve mystery with 2 other girls. New York or London? Read 2012-2016, published in 2000s.

[Lobstergirl, au gratin]

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[Kris]

Rachel, can you describe the mystery they're trying to solve?

I copied book details to the topic header. Feel free to edit it.