Even though this was written in the 80's, I found the content to be extremely educational. There was a practical list of what to do if you personally suffer from insomnia, as well as many study findings that talk about how to overcome poorly designed sleep schedules (by work, travel, or just personal lifestyle). I would recommend reading this if you're interested in the physiology of sleep. It was written for the average reader, and I didn't find the style to be too academic, making it a fast and enjoyable study of sleep.