A beautiful little book, the story of a hired housekeeper taking care of an eccentric math professor in Japan, and her 10 year old son. The professor reveals the beauty of mathematics (I got glimpses of it, but much of it is still mysterious to me!) to the housekeeper, and somewhat to her son. The professor has a 80 minute limit on his short-term memory, and has long term memories only prior to an accident many years early. The housekeeper is sympathetic to his plight. The professor is surprisingly connected to her son, and they communicate through their love of baseball. Because the housekeeper is a single mother and poor, the son has never been to a live game. As a treat for a birthday, she arranges to take both the professor and her son to a game. It's a pretty overwhelming experience on a lot of levels for them, especially the professor who has a fear of crowds. But it is touching to see how they work together.