I didn't actually intend to use Long May She Reign for Halloween Bingo. I just needed to read it because it's due at the library soon. But as I read it, I realized it would work for the Murder Most Foul square. The main character, Freya, becomes queen after the king and everyone ahead of her in line for the throne, as well as hundreds of other people attending the king's banquet, are murdered. Freya spent the book investigating the murder to bring the culprit to justice as well as to protect herself from a potential assassination attempt.