A fellow N.O.T. Instructor and N.O.T. Practitioner Dr Reza Samvat DC co-wrote a book with Henry Osiecki Nutritionist about sleep.  This is based on N.O.T. research, nutrition sleep deprivation.  You can purchase from Bioconcepts in Brisbane direct.  It is essential for ALL N.O.T. students/practitioners and of interest to all therapists to educate them of the importance of dealing with HEAD INJURIES!