Orbital by Samantha Harvey

From my review:

"This is one of those rare books that changes what I think a book can be.

"A beautiful meditation on the human condition as coupled to the — so-called — "Overwatch Effect." It took me a while to catch the rhythm of the book, but once I was in, I was in."

I read it just after it won the Booker Prize. But, I didnt know it had won the Booker Prize when I read it.