It allows literary theorists to skip the tedious "but what kind of work is this, really?" analysis which would otherwise be good for an undergraduate paper.
I can see the usefulness in cases like Gore Vidal's "Burr: A Novel" as perhaps either the author or publisher did not want someone not familiar with Vidal's work to think it a serious biography of Aaron Burr rather than a piece of historical fiction.
Other than that, it seems to be utterly pointless.
Couldn't say. I, personally, would think that a person could easily tell if a work is "a novel" rather than "a collection", "a chapbook of modern verse", "a pop-up book", or any other such simply by thumbing through it...
OK, sure, "...A Novel" is mostly an unnecessary thing to tack onto the title of a novel. But if the author or the publisher happen to think that it rounds out the name of the book in a euphonious fashion, why kick? When you get right down to it, the novel itself probably isn't all that necessary to the grand scheme of things.
Page 1 of 3