Books in Threes

In The Magus, when Nicholas first spends the night at Bourani, Conchis selects three works for him to read. A book of pictures of women, the bible, and ghost stories. These books reminded me of The Secular Scripture, where Frye speaks of truth, myth, and fable. The book of women is truth, the bible is myth, and the ghost stories are fable.

And here's an explanation of the last line.
http://www.fowlesbooks.com/ourjohn.htm