I very much enjoyed reading this book. This version if you can get it a rough print with hand sketches from the chalkboard.
It is the Biology courses given during 1970's at MIT. Book is divided into sections with total 36 lessons. Part I Cell Biology and Cell Chemistry, Part II Biochemistry, Part III, Genetics, Part IV and V developmental biology and physiology. Author is very clear in his explanations and time to time he provides practical examples. If you expect colorful pictures nice photographs this is not for you but good information is there together with some good references. The book itself was not a single source for me and I do not thonk it could be but written as the course was conducted and therefore have different touch.