It is no understatement that there would not be a Tali Forth without Brad Rodriguez' great series of articles on the internals of Forth, to be found at http://www.bradrodriguez.com/papers/ . Now, as announced by the German group Forth e.V. at https://www.forth-ev.de/article.php/20180401132719602 , Jürgen Pintaske has collected them in the form of an e-book as part of his "Forth Bookshelf" at Amazon: https://www.amazon.com/Moving-Forth-Int ... 07BTV7QVR/ . There is also a brief announcement of the publication by Brad himself at http://www.camelforth.com/news.php .