The book investigates the complex and often dual nature of Alzheimer's disease, exploring its multifaceted impact on patients and caregivers. Yves Christen, drawing on extensive research, presents a comprehensive overview of the disease's progression, its underlying biological mechanisms, and the current state of scientific understanding. The work aims to synthesize diverse perspectives, offering insights into both the clinical and personal dimensions of this neurodegenerative condition, and highlighting the challenges and opportunities in its study and management.

The book is positioned within the 'Research and Perspectives in Alzheimer's Disease' series, suggesting a focus on current scientific inquiry and varied viewpoints on the condition. Its inclusion in such a series indicates an intent to provide a detailed, possibly academic, overview for researchers, clinicians, or advanced students in the field. The title 'Two Faces of Evil' implies an exploration of the disease's dual impact, perhaps contrasting its biological mechanisms with its devastating human consequences, or examining different theoretical models of its development.