Karl Deisseroth explores various psychiatric disorders with flowery prose here, bringing in a bit of neuroscience and optogenetic studies to illuminate some of the underlying processes at play. By far the best chapter here is on schizophrenia, and since I've spent a lot of time interacting with people with schizophrenia I can tell you it very nicely captures the essence of those conversations and thought processes. As a heads up this is more of a memoir than a scientific book though, so plan accordingly.