Okay, so Plato's Phaedrus isn't exactly a literary text, but you know by now that deconstructionists and poststructuralists don't give a dang about the differences between literature and philosophy. And even if they did, a lot of Plato's work is pretty conventionally literary anyway, if we do say so ourselves. After all, dialogues like Phaedrus are stories about Plato's revered teacher, Socrates, and all the cool stuff he said before he was sentenced to death for "corrupting" (i.e., teaching) the youth of ancient Athens. Talk about juicy material.
Anyway, Phaedrus is a prime example of the way Western philosophy ranks speech above writing, and so it's no surprise that Jacques Derrida returned to this dialogue more than a few times over the course of his career.
Reading it, why not ask yourself:
Why does Socrates tell Phaedrus that bizarre story about Thamus and Theuth?
And is Plato using any irony as he writes about the superiority of speech over writing?