A google search for "recovery" will show you countless hacks, methods, and products, but often your innate recovery system is overlooked or brushed aside. Sleep is possibly the most useful tool you have in your belt for both cognitive and physical recovery. Despite this, many people fall short of the sleep they need and or lack the efficiency to get it done in their allotted time. 
The outdated idea of "eight hours and you're good" plagues the modern world as many people spend large parts of this time awake or in very light sleep patterns. The architecture of your sleep is highly influenced by lifestyle choices, nutrition, supplements, and circadian rhythm.  This book will examine what a healthy sleep pattern consists of as well as the methods, products, and actions you can implement in your life to sleep more efficiently. 
Learning how to use sleep as a tool vs a nightly chore will allow you to operate at a level that many fail to achieve. Things like becoming less dependent on caffeine or not relying on sleeping meds at night inject freedom into your life that often goes unappreciated. This combined with increased mental clarity and physical energy will allow you to achieve goals in all aspects of your life as well as mitigate your risk for countless illnesses.