Does anyone know who wrote the shorthand in the Centennial books? Generally speaking, it's pretty well done, although the lines are not as crisp and defined as in earlier Gregg publications. In the two books I have, Charles Zoubek is the only author, and no credit is given for the shorthand.
As a DJS writer, it's interesting that both Series 90 and Centennial seem essentially identical--when I read that shorthand the differences are infrequent and scarcely noticeable. It makes me wonder why Gregg even bothered with those two "revisions."