the shakespeare analysis seems like a good idea to me. I am not aware of literate papers that try to analyze it with frequency analysis instead of just vague assertions by the authors. there is a huge set of literature that tries to link of the writings of shakespeare to someone else, but as far as I know not much of it is computer analysis.

This was what brought William Freidman to Riverside, where he both created monographs on cryptanalysis and met his wife. (described in detail in Kahn.)