The Dragon King's Chosen Bride
This book would be of no help because the author actually ended up being chosen as a bride.
Moria was the daughter of the Village Head of Nakuriver, one of the seven villages that made up the mighty Kingdom of Ignas, which was ruled by the dreaded Dragon King.
When Moria was 18, she had participated in the Choosing Ritual, as the rules had demanded, and had somehow been lucky enough not to be chosen.
That was when she had written this book.
Almost every lady across the kingdom started reading it, so they could be as lucky as she had been. But then she got chosen at 25, and people threw the books out their windows, realizing that even the book couldn't save them from the doom they called a Ki