A book cover designed for Wiseologie, a media publication group in America. "SHARP: Simple Strategies to Boost Your Brainpower" is written by American author, Dr. Heidi Hanna. She discusses how common demands on one's time and energy impact one's mental capacity, and may speed up the rate of cognitive decline when left unmanaged. The fitter our brain is, the more energy efficient it becomes, and the easier it is to do important mental tasks such as focusing attention and being creative.