The participants include four Pulitzer Prize winners, Michael Chabon, Robert Olen Butler, David Herbert Donald and Richard Ford; the American poet laureate, Billy Collins; two Arab-Americans, Naomi Shihab Nye and Elmaz Abinader; and Robert Pinsky, Charles Johnson, Bharati Mukherjee and Sven Birkerts. They were all asked to write about what it means to be an American writer.