What is the author's style in A Very Old Man with Enormous Wings by Gabriel Garcia Marquez?

In establishing the character of the old man, Garcia Marquez plays against traditional stereotypes of angels. Angels are supernatural creatures and are expected them to be presented in images that convey grandeur, perfection, wisdom, and grace. By definition, angels are contrasted with humans; though they resemble humans physically, they are super-human in every conceivable way.