Hal Duncan's extraordinary first novel, Vellum , arrives in U.S. bookstores today. Vellum was among the best books published in 2005 that I read , and I am curious what U.S. readers will make of it, because it is not an easy book to read, and many people will, I'm sure, complain it is impenetrable, pretentious, self-indulgent, etc. While reading it, there were moments when I was tempted to call it all of those things (yes, even "self-indulgent" !), but each time I was ready to give up on the whole book as gassy claptrap, something snared me again, a detail or a phrase or an image, and before I knew it, I'd read another fifty pages in a kind of hyperattentive dream. Some reviewers have, of course, disliked the book, and that hasn't surprised me at all -- this is the sort of book that causes strong reactions in readers, and it is a book that requires some real effort to read, given its length and complexity. I've not been much annoyed by reviewers who