Medina spends quite a bit of time explaining the "biology of Alzheimer's Disease" which can get quite technical. But, if you are interested in how the brain and nerve cells are affected, as well as other physical aspects of the disease, you will love these sections. His graphics are superb. My other favorite chapters deal with understanding difficult behavior, suggesting helpful, personal interventions, and offering practical advice for helping with the activities of daily living for a person with Alzheimer's Disease.
In short, the book is wonderfully designed, clearly detailed, and touchingly compassionate.