Of the article, or How to Lie with Smoking Statistics?
The article is sadly owned by the journal, which does allow authors to post pre-prints on their personal sites.
The book I'm not so sure about. I spent some time researching the copyright status back when I wrote the article, and the results were confusing. I don't think Huff ever registered copyright for How to Lie with Smoking Statistics, which was required at the time, but unpublished works were protected, and when the copyright system changed in the 70s unpublished works were given some statutory protections. The book only became public because of the Tobacco Master Settlement Agreement, which I haven't read but presumably sets some conditions on the documents it makes public.
In the end I decided it was safest to link to the Tobacco Documents Library, though I was very tempted to typeset a new edition of the book so we could enjoy an example of corporate propaganda.
