r in Japan, selling more than 2 million copies! Designed for readers who want to keep their minds sharp and stave off the mental effects of aging, this book presents a complete 60 day program to build a better brain. The program consists of a daily worksheet of simple caclulations that takes less than 5 minutes to complete. Each week, readers take a short evaluation test to measure their progress. The world has long recognized that physical exercise helps maintain a healthy, well-working body. Now it's time to acknowledge that our brains need a regular work out too!