This log book brings together the in-patient version originally designed by Professor Arthur Crisp and Dr Kingsley Norton for use by people undergoing treatment in the Anorexia Nervosa Unit at Atkinson Morley's Hosptial, and the out-patient version published by Professor Crisp in 1993. The latter has been used by those attending the out-patient treatment programme of St George's Hospital Medical School and the related Highly Specialist Services section of Pathfinder Mental Health Services NHS Trust, and in other centres in the UK.The overall treatment programme is presented in the author's Anorexia Nervosa: Let me Be, first published in 1980 and now reprinted by Psychology Press.The Patient's Log Book is intended for both in-patient and out-patient use, as part of a clinically supervised treatment programme based on the "St George's" approach outlined in Anorexia Nervosa: Guidelines for Assessment and Treatment in Primary and Secondary Care.