In Sleep, psychologist Christine Parsons lays out the benefits of sleeping for our bodies, minds, and societies. The negative effects of chronic sleep deprivation include correlations with Alzheimer’s disease, relationship problems, and car crashes. Parsons provides helpful tricks, training, and therapy to overcome the most common obstacles to better sleep hygiene. Exploring different sleep styles, she assesses which ones work and which ones don’t—helping lead us to a better night’s rest.