Dementia with Lewy bodies is now accepted as the second main cause of neurodegenerative dementia and it vies with vascular dementia as the second most common form of dementia overall. Like Alzheimer's disease, it is an age-related condition and as such prevalence and incidence will dramatically increase with the ageing of the population over the next 20 to 40 years. Huge progress has been made in the last decade in terms of its recognition as a common cause of cognitive impairment, its clinical features, its underlying neurobiology, investigative changes and management. Although there are several other texts on dementia, none deal appropriately with Dementia with Lewy bodies, mainly subsuming the whole of the condition in one or at most two chapters and have an undue prominence to other forms of dementia, mostly Alzheimer's disease. There is clearly a need for a new text solely focused on this condition which covers state-of-the-art topics covering the whole spectrum of the disorder from diagnosis to management and including what is known about neurobiological changes. Dementia With Lewy Bodies summarises state-of-the-art science and will be equally accessible to clinicians such as