Who is the greek god of writing?

The Greeks actually did write but they weren't really interested in it to a level where they would make a god for writing and also it's not as important as war, harvest or other importanat things. The closest Greek gods to it I would say is Dionysus, the god of wine, parties and festivals, madness, tragedy, drunkenness and pleasure. Because is a festival for him which involves authors writing plays, the one judged the most tragic and dramatic would win a prize. Though, yes, they don't really have a god or goddess of writing.