Books Dr. Martine F. Delfos PhD has written many books, many of them in the field of psychology. Most books have been written in Dutch. Here all the books written or translated in English. Chapters Here you find a limited selection of bookchapters that are currently available in the English language. Articles Here you find a limited selection of articles that are currently available in the English language. PICOWO series A series of books from the research institute PICOWO.