Elevator Pitch: 

Agatha Christie as told by Carlton Cuse and Damon Lindelof.

Why I liked it: 

in 2009 ago J.J. Abrahams guest-edited a special issue of Wired, all about magic, mysteries, and puzzles, I urge you to read this essay he wrote especially for it, about the Age of immediacy and the longing for mystery. Trying to solve the puzzles put in that issue you could've make notes, or you could've get happily Lost in it.
I share J.J. Abrahams love of mystery, hate it when everything has to be explained and resolved. But a lot of people really hate the opposite. When you are exact and precise, you need mathematical precision in your intricate storytelling; I like to wander within it, like in life, and enjoy it.
Trying to figure things out is not the same as understanding. The first can stand in the way of the second.
So what has that to do with The 7.5 deaths of Evelyn Hardcastle?  This book caters to both types of readers. You could keep a notebook next to the book, and follow along to see how everything plays out, *it's a lot. Try to anticipate how it will all match up will break your brain. How bewildering this book can be from the start, all the questions will be answered. They all get solved. Bar one, and that one is left for the likes of us, who love to use imagination to continue the story in our heads after the last page.
So this book a very well constructed puzzle and a post modernist mystery — a dismantled Agatha Christie-like plot, that will be slowly put together with an array of twist and turns.

What is it about: 

A man wakes up without memory with only a name in his head: Anna. He soon learns he is in a manor, with servants, teatime, pretty maids, hunting parties, bitter old ladies, the Downtown Abbey-works.
He will also learn his purpose. Find out who will kill Evelyn Hardcastle at 11 pm. He has till midnight to come up with the answer; then he will switch body, and relive the same day.  He has eight chances; eight body-swaps to go. Then his memory will be wiped, and he has to start all over again.
Stuart Turton is a fan of Quantum Leap, and of course, you could talk about Greyhound Day, many body swap movies and Black Mirror ( pay attention, the puzzles start here).

Comes down to:

An inventive, well plotted, mind-boggling ( you have to drink lots of caffeine to keep up) ride.