A leading sleep scientist on how to have the best nap you’ve ever had. Saved by the Siesta explains how siestas work and the remarkable role they can play in overcoming the destructive effects on the brain and the body of a shortage of sleep—for a siesta is like a night’s sleep in miniature. A daytime nap fulfils all the same functions as a night’s sleep—hormonal, purifying, curative, consolidating, and reinvigorating. It also has the same therapeutic values: it helps us to