I picked up this book because I had some familiarity with the subject matter having worked in that field of biochemistry in the late '60s. That is probably the main reason I read the whole thing and enjoyed it.
This is very much a scientific biography. It's an interesting story of the evolution a scientific idea (The Chemiosmotic Theory) and how that idea came to be accepted by the scientific community. The originator of the idea, the imaginative, ambitious, passionate Peter Mitchell, had to fight for many years to see his theory finally accepted.
I was disappointed, however, that the book did not paint a fuller picture of Mitchell who had many interests outside of science which are (frustratingly) alluded to - music, architecture, farming, family - but never explored. For example, the authors state that family life was very important to Mitchell but give no examples of how a highly motivated scientist/entrepreneur managed to fit it in. Nor is there any sense of what domestic life was like living in an isolated research institute/manor/farm. In my opinion, if these aspects of his life had been more developed, the book would appeal to a wider audience and the reader would come away with a fuller appreciation of the man.
Technically, it is rather a choppy book. Each chapter is divided into subchapters, which detracts from its cohesiveness. Repetition of some points also gives the sense that the book was pieced together.
However, I did read the whole thing and found it an interesting study of how 20th century science works - or works imperfectly.