I love this book. It was packed full of intrigue, theoretical physics, philosophy, and mice. “The End of Mr. Y” has bumped “Popco” as my favorite Scarlett Thomas book yet. In her previous books I had taken issue with her endings which I felt were a bit weak, but not so here. Well done, Scarlett! Thanks for writing smart fiction. My head still hurts from being wrapped around the concepts in the book. Youch!