From its title forward, AMERIFIL.TXT is an unusual book. The title, unpacked like a computer filename and pronounced "Amerifile Text," reveals the book's beguiling proposition: that the answer to the question of what it means to be an American lies not on television talk shows nor within think tanks but within American memory itself. The virtue of this "Amerifile" is to demonstrate that such memory exists, in texts ready to access as if they...