In his book "The Future of Sleep," Scottish scientist David Fraser-Harris offers us an interesting exploration of "the world of sleep," highlighting "the importance of this vital phenomenon for human health and psychological well-being." The book begins with a simplified definition of "sleep," explaining how to get "deep, restful sleep." He reviews the "history of sleep through the ages," pointing to the "beliefs and superstitions" associated with it in various cultures. Fraser-Harris discusses in detail "the problem of insomnia, its causes, and methods of treatment." He then moves to the "world of dreams", trying to decode them and understand their psychological connotations. The book not only looks at "sleep" from a "medical perspective," but also addresses "the future of sleep in the modern era," imagining how technology and urban developments will affect "our sleeping habits."

كان "ديفيد فريزر-هاريس" (1867-1937) عالمًا فسيولوجيًا وَكاتبًا اسكتلنديًا بارزًا. وَقد أمضى سنواتٍ طويلةً في البحثِ وَالتدريسِ في مُختلفِ الجامعات البريطانية وَالكندية. وَقد اشتهرَ بِأبحاثِهِ في مجالِ "فسيولوجيا النّوم" وَ "العواملِ المُؤثّرةِ فيه". وَتُعدّ مؤلّفاتُهُ مرجعًا أساسيًا في هذا المجال حتّى يومنا هذا.