Brilliant time travel thriller. Voted best science fiction book of 2019 by Goodreads readers. I enjoyed Crouch's Dark Matter and this is even better. Brilliant time travel thriller. Voted best science fiction book of 2019 by Goodreads readers. I enjoyed Crouch's Dark Matter and this is even better. It starts off slowly but pay attention. Everything is built upon the beginning. But it's not too hard to follow and comes to a good conclusion....more