The distinction between books, magazines, etc., is almost universally accepted, and followed here. It cross-cuts the literary genres to some extent, because while a novel is almost certainly a book, a poem is not one, normally -- yet a book of poetry is familiar enough. Dickens' novels came out as part works, and so do some modern stories. An obituary in a newspaper is a kind of biography at the level of a short journalistic piece, etc. However, it seems in our normal understanding of classification, literary texts can be kept together, at the risk of duplication of some criteria, rather than mixing them up with nonliterary material according to other criteria.