I really love how the author states at the beginning of the book that, unlike many other functions of our body that are performed by specific organs, there is no such thing as an "immune organ" dedicated solely to an immune function. This isn’t to say that other parts of our body are trivial, but rather that they are generally far less complex than the immune system as a whole.
So, what is the immune system, how does it work, and who actually does this work? As someone who isn’t an immunologist but has a high-level understanding of human biology, including blood composition and cell structure, I still found much of this book to be new and eye-opening. Every single chapter unraveled myths I previously believed and replaced them the with well-explained facts. The level of detail mixed with a chunk of humour make this book both interesting and informative to the extent that by the time you finish, you won’t have any open questions left. You’ll learn about why we need bacteria, viruses and fungi. You’ll get to know key components of the immune system, such as macrophages, B cells, T cells, among many others. You’ll discover the hidden role of the appendix and tonsils, as well as what happens if they are removed. These are only few of the topics covered in the book, but you can also find insight about cancer cells, autoimmune deceases, transplantation, fasting, and so on and so forth.
As I was listening this as an audiobook, I’d like to additionally highlight that the narration of the book by Mike Cooper is wonderful. He reads in a highly engaging manner, varying his intonation, tempo, and volume, which is something you wouldn’t necessarily expect for such a technical book. That being said, I still found the subject matter difficult to absorb while multitasking. I had to make a conscious effort to find time and place where I could fully concentrate on the book without distractions. Otherwise, it was easy to lose a thread due to the complexity and so many of in-depth biological explanations.