Bought this recently, not because I want to learn how, but in the hope that it would contain some good images, which it does - sadly most aren't in colour. I've worked in the medium over the years, and you can see a few examples here. Perhaps I should read this book. Natalie still works, as you can see here. Jack used to teach at Camden Arts Centre, coincidentally, by which I mean I'm a resident of Camden Town, not a former pupil. More info and interviews with him here.