The Many by Sylvain Neuvel

Whoever tells you that science fiction has nothing new to offer, tell them about this novel.

What follows is not really a spoiler if you have already read the book’s synopsis: 

What Sylvain Neuvel offers in The Many has already been dealt with before, of course; at the end of the day, the science fiction genre as such already has more than a century of history; but in this novel the author provides a very innovative point of view. I think of major contributions from earlier novels and short stories such as Who Goes There? by John W. Campbell, or the masterful inversion of this story made by Peter Watts in The Things (it is actually based on the movie The Thing, itself based on John W. Campbell's novella); and also, of course, The Body Snatchers by Jack Finney.

As I say, here the author—as is already becoming something of a hallmark of his novels—achieves a very original way of expressing it. How? Well… although he has previously set up a solid worldbuilding, his best asset is his literary style: the very particular way he has of playing with the first-person narrator, even though he also combines it with the omniscient narrator.

After some opening chapters that are masterful in terms of the treatment of the characters, the narrative develops into territory that some readers may find more debatable, but that is not my case.

I do not want to explain more, only that in one sentence The Many could be described as the definitive ensemble novel.