The Guest List by Lucy Foley
I really wish blurbs would stop comparing book to Agatha Christie's. Lucy Foley is not Agatha Christie and her book really has little similarities to Christie's except a dead body. We don't have a detective, amateur or otherwise. This isn't even a traditional mystery, more of a psychological thriller. I think the comparison is misleading and not fair to Foley.
The Guest List alternates between many points of view, with a different narrator for each. Usually, I'm not a fan of multiple narrators but it works well here. We have the bride, the groom, the best man, the plus one, the wedding planner, and the bridesmaid. We know something bad has happened but we don't know exactly what or who got hurt. The timeline also jumps back and forth between the past, two days before the wedding, to the chaotic wedding day in the present. Details are revealed slowly. The tension just keeps building as we learn the characters' fears, secrets,...