The 7½ Deaths of Evelyn Hardcastle by Stuart Turton
I don't want to tell you much about The 7½ Deaths of Evelyn Hardcastle. I don't want to ruin it for you. Someone described it as "Agatha Christie meets Groundhog Day" and I think that's pretty dead on. If you enjoy a good country house mystery, but like to take a chance with a book that's outside the usual, that may confuse/frustrate you at times, you should definitely pick it up.
Aiden Bishop is our detective, but he doesn't remember being Aiden. He only knows that he's here, in Blackheath, and has to solve a murder that doesn't look like a murder. He repeats the same day eight times, but in eight different bodies. There are clues and red herrings, helpers and adversaries. We've got the standards of a house party, relatives who don't get along, guests with tons of secrets, scandals and drugs. And then we've got the almost sci-fi aspect of switching hosts and affecting how the day progresses...