I found this book very interesting and informative. Lehrer cites scientific experiments which show the part of the brain used when making rational decisions versus emotional decisions as well as the parts affected by dementia, Alzheimer's, autism and trauma, etc. It's written in language that a layperson can understand. I would recommend it for those who want a better understanding of these conditions. We have friends who have autism and dementia in their family. It helped me to better understand the problems that they must face.