Speakers at the conference displayed an irrepressible predilection for directing listeners to their inscriptions, be they books or papers. But they would not do it except under the cover of some excuse, as if they were ashamed to be candid about promoting themselves in this way. The speaker casually announces at several points in her presentation, 'This is a very complicated matter that I can't do full justice to in the short time I have for this presentation. I go into it in much more detail in my paper. In fact she has a suitcase full of them in her hotel room, even if she is only carrying a discreet number in her bag.
Books are slightly different.
When a speaker has recently had a book published, she will go to extraordinary efforts to bring it to the attention of the audience. One speaker demonstrated how to do this with aplomb. His turn came to present his paper. He had to walk from one end of a very long desk at the front of the lecture theatre all the way to the opposite end to get to the lectern. There he arranged his papers.