I have a major new non-fiction title coming out on June 5, "The Mysterious World of the Human Genome". Your genome defines you at the most profound level. It directed your physical and mental construction from the fertilised egg to the emerging baby, and it continues to direct and care for you all of your life. It determines what you immune system recognises as "self". I've been involved in understanding how it works for 20 years. I have compared it to a mysterious world, and it really does have features that fit with this metaphor. I have even introduced the metaphor of an ultramicroscopic steam train that will take you, my reader, deep into this mysterious world so you can examine it directly . . .