Being unable to sleep is one of the most common health problems - one in 10 adults and 1 in 5 of those over the age of 65 suffer from insomnia. Billions of pounds are spent worldwide each year on prescribed medications and over-the-counter remedies, often with little real benefit to the sufferer. Extensive research conducted over 25 years has now established cognitive behavioral therapy as the treatment of choice. For the first time these CBT principles have now been brought together into one comprehensive self-help manual.