Hmm. I wouldn't say, "only". When writing about literature, the convention is to use the Literary or Historical Present e.g., Shakespeare says, not Shakespeare said, to (a) express a fact/a general truth, (b) draw the reader in, and (c) make the argument present.Originally Posted by lawrenceMcCambridge-audin
Click here to read more and try searching under the terms literary present and historical present.
[Edited to make link work - Shane]