Ray M. Merrill & Bill Rodgers 
Infinite Runner [PDF ebook] 

Consistent running can positively influence our mental and physical health, extend life and the quality of it, and contribute to a "good life." This book relates running to specific dimensions of well-being that support a good life. It further talks about nutrition and sleep requirements for runners, changes in our running ability with age, how running contributes to brain health, and that some important life skills can be learned through running. Many of the central ideas presented in this book are developed with the life experiences of one of the greatest distance runners in our modern time, Willian Henry ("Bill") Rodgers.