Unthinkable is one of my favourite books. You must give it a read if you're interested in how our brains work. Really eye opening and written beautifully without using too many confusing medical terms.
This book is AMAZING!! For anyone curious about the weird nature of brain and how beautifully strange it is should read this book. A story telling of the lives lived by some people with very strange(and perhaps amazing) mental abilities and a user friendly explanation of the neuroscience behind it makes the book very comfortable to read. It's not like you have to be a scientist to read it. Plus reading it in a way inspires you that you will understand only when you read it.