I was born in 1950 in Amsterdam. I worked as a chemical engineer in petroleum industry and am now retired. So far I have published several books on a variety of subjects. I enjoy writing and becaus...view moreI was born in 1950 in Amsterdam. I worked as a chemical engineer in petroleum industry and am now retired. So far I have published several books on a variety of subjects. I enjoy writing and because I have a wide field of interests, I have written about technical, phylosophical and other subjects.view less