A balanced, scientific, and practical approach to monitoring and maintaining your brain's agility and mental health.How do you expand your brain's skills? How do you keep your brain working at its best as it ages?Bookshelves are full of writing by charismatic authors claiming they have found the answer, whether they are neuroscientists, psychologists, or mystics. The Brain Fitness Book looks at the well-established science and recent scientific revelations, and offers a well-