Kill Your Husbands by Jack Heath is very cleverly written because in the present the police are interviewing the survivors politely, using their title and surname, but in the past (well, very recent past… last weekend) they all use first names. So for a long time we don’t know who’s dead and who’s not.
Weirdly it didn’t occur to me until I started the book that it was a follow-up to Kill Your Brother, which I enjoyed when it was released in 2021. It’s not exactly a sequel as such, rather it features two of the same characters, cop (here recently promoted to detective) Kiara Lui and her girlfriend Elise (held capture in the first book). Their relationship is on rocky ground here, well so thinks Kiara as Elise is acting strangely and keeping secrets from her.