This is a very interesting book, not exactly a text on genetics and heredity, but summarizing the body of knowledge in those fields. It gives an excellent high level view of genetics and shows how individual experiments or discoveries have produced the current science. It is also, in part, a history of the subject relating the way these discoveries have built one upon another. As he discusses the developments in the science he also reflects that as we delve deeper into the understanding of molecules we get further away from the fact that we are really dealing with living, breathing, thinking organisms that somehow go beyond these bare molecules. He looks for a greater understanding between the molecular and the finished living system. The book is written by a genetic scientist who spend the first part of his career working in the field and later moved more to the study of the history and philosophy of the field.