Some risk involved in beginning with a leap; Mitchell’s Picture Theory
splinters through the title’s pun–a theory of pictures and theory pictured or
picture-able.  In the introduction, Mitchell calls the problem of the 21st
C. a problem of the image.  This opens onto difficulties with the
relationship between word and image, mapping and organizing fields of
representation, and discord between reading proper and spectatorship (3). 
Fumble them as we inevitably will, these and other differences might seem less
gnarled if we "adopt Michel de Certau’s terminology and call the attempt to
describe [them] a ‘heterology of representation’" (5).

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