The writer takes you to through various sleep conditions and how they arise and affect people. Insomnia, narcolepsy, night terrors and apnoea are just some of the conditions afflicting those struggling with sleep. This book illustrates the neuroscience behind our sleeping minds, revealing the many biological and psychological factors necessary in getting the rest needed for health and happiness. For those who have irregular sleep time, this book maybe can help you. Helpful and informative.