The touchstone of life
The third part looks at information flow between cells, and how this made possible the existence of multicellular organisms. The book makes much use of analogy and metaphor, putting across the subject in terms of stories about (Maxwellian) demons and the like. I wasn't so keen on this - I felt that sometimes it obscured the important content, and made the book overlong and wordy. However, if you can put up with this then you are likely to get a lot of benefit from this book, as it makes an advanced subject accessible to less technically minded readers.