This was a really interesting book. The author explains about how your immune system, your mind and the microbiome (your gut) work together. He shows how in recent decades, new research is helping us understand how they all can have affect on each other and some illnesses. I have no science background but found it fairly easy to follow and very readable. I liked how the author explained where he got his information from at each stage and a bit about his background etc. I also liked how he explained how we can improve things ourselves in the last section of the book. It was really informative.