TC - I don't have a book on Johnston handy. I have read little about him other than short passages in various books referring to Seven Pines and his defense of Richmond. If you find anything on him, I would be interested.
I searched my personal database and found nothing, but Amazon has a few entries for Joseph E. Johnston
Also, the Foxhole did a profile of Seven Pines in December
Thanks! I'll try to remember to drop you a note if I find a really good book (all bets are off when I have the baby ...). Charlotte/Mecklenburg Library has a surprisingly broad collection for a Soviet institution :-).