TO SIGN OR NOT TO SIGN...THAT IS NO LONGER THE QUESTION. If the publisher sends an author out on the road to do programs like ours (tonight, Ron Chernow; tomorrow, Ron Rosenbaum) they will also be doing book-signing sessions at Border's or at Barnes and Noble. But what rules and limits are layed down? The dope on that aspect of "the tour" is found in this article from yesterday's Wall Street Journal. Nota Bene: we know all the book P.R. people quoted here and can attest that they do know the rules--because, in fact, they wrote them!