Daniel replies:

I have spent 36 years being bald. Librarians are unusual among groups of people grouped by profession or interest in that they are actually interested in that interest by which they are grouped. So, in my humble opinion, librarians want to hear about books--reading books, writing books, making books, buying, selling, storing, stacking, transporting, translating--everything about books. When you talk to librarians, you can't go wrong if you talk about books. That is my opinion. Hi, Nina!