Does your diocese operate a bookstore? Mine doesn't.
"Approved" for what? Only an ignoramus would think that that Martin Luther King was reflecting Catholic teaching with his books, although his non-violent protest is in keeping with Catholic social doctrine.
And, I'm sorry, but a purported Catholic website that says that JP II is an illegitimate pope is far worse than anything written by the authors you list, though I laugh at such nonsense and the people who support such nonsense.