From a sheet of Call of Cthulhu Survival Tips [author unknown]:
Never become good friends with University professors. They are the living embodiment of trouble. In fact, watch out for people whose job is to read books, specifically old books, or tomes as they like to call them. They always want help after having summoned The Horrible Horror with a Shady Reputation. Helping them will get you dead right quick, or at the very least insane. Surreal happenings or outer-dimensional summoning may be commonplace in their lives; better not make is commonplace in your life.
Being illiterate is a good thing.