Book excerpt: The APA Handbook of Dementia addresses assessment, comorbidity, evaluation, and treatment of various forms of dementia. The handbook reviews common dementias including Alzheimer's disease, Lewy body disease, vascular dementia, frontotemporal dementia, and other less common dementias. It is organized into sections discussing diagnosis, epidemiology, and neurobiology (including neuropathology and neuroimaging); assessment, including cultural issues, methodology, and neuropsychology; and primary, secondary, and tertiary intervention strategies. The handbook is intended as a resource for all psychologists and other health professionals that serve persons and families impacted by neurodegenerative disease.