I think a book-length poem stands about as good a chance as a collection of individual poems in reaching its field of ears. This does not mean I have not found some of them too daunting to read all the way through, but it would seem there ought to be some ambition on the writer's part to create a work that would be "a read" all the way through. If not, all the pleasure belongs to the maker, and that in itself is something, an achievement.