What exactly is Alzheimers disease and dementia With Alzheimers and dementia now reckoned to affect many in our population this is a question that more and more people are needing to ask. Understanding Alzheimers and Dementia provides a clear and concise introduction to this fascinating and complex subject. Written in accessible nonspecialist language it provides an ideal introduction for parents carers partners indeed for anyone who is faced with a loved one or client with these conditions.s