Excellent book to overcome insomnia if you apply to the letter the recommendations of Dr. Royant-Parola, including sleep rhythms to condense, rising every day at the same time, you'll see, it's hard to start but then it works TB and you wake yourself. Your sleep is not quantitative but QUALITY. In addition, it contains very good advice (very reassuring) on the use of medicines and the gradual withdrawal. Furthermore, I recommend to consult in cases of severe insomnia.