Except that PDF shouldn't exist since it was generated in flagrant disregard for the copyright/comment: % This manual is copyright (C) 1984 by the American

Except that PDF shouldn't exist since it was generated in flagrant disregard for the copyright/comment: % This manual is copyright (C) 1984 by the American Mathematical Society. % All rights are reserved! % The file is distributed only for people to see its examples of TeX input, % not for use in the preparation of books like The TeXbook. % Permission for any other use of this file must be obtained in writing % from the copyright holder and also from the publisher (Addison-Wesley). \loop\iftrue \errmessage{This manual is copyrighted and should not be TeXed}\repeat If you want a free PDF on TeX try _TeX for the Impatient_: https://tug.ctan.org/info/impatient/book.pdf https://tug.ctan.org/info/impatient/book.pdf If you want a copy of _The TeXbook_, buy it.