Kevin Krawczyk is disappointed. A manager at the Family Christian Store chain, he is hosting a book-signing for Tim Pawlenty in Lombard, Ill. “We were expecting more,” he says. The shelves are lined with many untouched copies of Courage to Stand: An American Story. Under the author’s name, the book cover identifies him: “Former Governor of Minnesota.” Newt Gingrich, Sarah Palin, and Mitt Romney don’t need such lines on their book covers. As Pawlenty prepare...