This is probably the wrong forum to ask this kind of question. I think that the majority of people following Jim Wendlers work is interested in performance not aesthetics… or at least that’s my interest… maybe I’m wrong
Its a Strength Phase so the programming question is for Strength, not aesthetics interested in 5/3/1 training for this phase but not sure what book or program to read more about from Jim.
I have very little experience on specifically training for size or aesthetics. Generally, all my experience is training for specific performance goals. You probably would be better off asking this same question to someone who is a competitive bodybuilder; i.e. someone who has some stake in the game.