Man has always been driven to create. We constantly shape the world around us by inventing stories of heroes and monsters, by crafting complex but passionate ideals about good and evil. Some relish in the power that this manipulation of reality wields; others are more innocent in that they are simply yielding to a universal longing for something in which to believe.

In both John Gardner's Grendel and Mary Shelley's Frankenstein, creation is a central theme. Victor Frankenstein is inexplicably driven to make a creature like himself, though he doesn't have any external reason for doing so. The monster himself enacts a kind of creation; he seeks to understand the truth of human nature by reading man's works, but also indulges in his own stories and fantasies of a life lived among friends. Shelley explores to some extent the morality of such...