Sleep is a matter of LIFE AND DEATH. When we can’t sleep, we suffer in our productivity, mood, our relationships, men's sexual health, teen learning, and our physical health. Not sleeping CAN BE THE DEATH OF YOU. What do you know about sleep? In this book, readers will learn about: Why we MUST sleep, how the brain uses sleep to clean up the day’s toxins, how sleep relates to dementia, common sleep disorders, the power of naps, sleep and our immune system and medical disorders such as diabetes, what “sleep hygiene” means, how computer screens and cell phone blue light affects our sleep cycle, the meaning of “sleep debt.” You’ll find useful tests to see whether you are a “lark” or an “owl” and when you are at your best in terms of sleep. For extra measure, there’s a test to gauge your stress level and how that affects your sleep. Why are corporations encouraging employees to sleep on the job? Packed with useful references to important sleep articles you’ll want to read to inform yourself about sleep and how important it is. Don’t sell sleep short or it WILL kill you.