Apparently not content being a best-selling author, Ben Mezrich is trying his hand at television. The “Bringing Down the House’’ author will host CNBC’s morning show “Squawk Box’’ Wednesday, and his guests will include Celtics CEO Wyc Grousbeck, “Social Network’’ producers Dana Brunett and Mike DeLuca, and perhaps Red Sox owner John Henry. (We’re told Henry’s travel schedule may prevent him from being on.) Mezrich is hopeful that the stock market will respond positively to his appearance. “I fully expect the market to spike as high as my hair,’’ he told us Monday.