Now, my books are on view, accessible to all and equipped with magnetic bar codes. Moreover, they also have a beautiful ex libris label, which was created to resemble an ex libris label stamped on the title page of some editions of my books, for example Philosophiae Naturalis Principia Mathematica by Isaac Newton from 1739, left at the Vivarium Foundation. I don’t know what happened to the stamp itself. Perhaps some day someone will find
