The author, a medical doctor, in this book recounts his conversion from a Darwinist to an Intelligent Design advocate. He also goes into detail about his indoctrination into Darwinism in school and why he began to doubt Darwinism in later life (as have more and more intellectuals today). What Darwin Didn’t Know is an excellent, very readable, work about how little Darwin knew about biology, especially cell biology, because so little was known when he lived and worked. If he lived today in a non-Darwinian world, his theory would have difficulty getting published in a mainline journal. For example, in the middle 1800s cells were thought to be simple globs of protoplasm that served as mere building blocks of a body much like bricks are used to construct a house. Now we realize that cells are the most complex machine in the known universe that can live on their own in the right environment. Over 200 very different types are known. Much of the book is on human anatomy and physiology and why our modern knowledge has proven Darwinism wrong. It is an excellent introduction to anatomy and physiology that covers all 10 organ systems plus cell biology.