What is the fine-grained topic of the following text: Even that old sourpuss Cormac McCarthy seems to have been transformed by fatherhood; his novel The Road, best known for its unrelieved bleakness… is the first in which he’s written convincingly about a truly loving relationship (as opposed to an obsessive Liebestod for a beautiful doomed prostitute or the enduring bond between a boy and his wolf): the love the nameless protagonist feels for his fragile, ineducably decent son. Only return the topic.
Cormac McCarthy's depiction of a loving father-son relationship in his novel "The Road".