He has mentioned authors like:
* William Faulkner: Franco adapted Faulkner's novel "As I Lay Dying" into a film.
* Herman Melville: He expressed admiration for "Moby Dick" in interviews.
* Cormac McCarthy: He's spoken about enjoying McCarthy's writing style and works like "Blood Meridian."
* Jack Kerouac: Franco directed and starred in the film "On the Road" based on Kerouac's novel.
* Beat Generation: He's shown interest in the works of other Beat writers like Allen Ginsberg and Gregory Corso.
However, it's important to note that this does not definitively confirm a single "favorite book". He may have a personal favorite that he hasn't publicly shared.