Dark Matter by Blake Crouch

This book was SOO good! Kind of reminded me of The Midnight Library but more sci-fi. ——————— In this world he's woken up to, Jason's life is not the one he knows. His wife is not his wife. His son was never born. And Jason is not an ordinary college physics professor, but a celebrated genius who has achieved something remarkable. Something impossible. Is it this world or the other that's the dream?