In 1972 the Tate bought Carl Andre’s Equivalent VIII, six years after it was first exhibited. The set bought by the Tate however was not one of the original sets exhibited. Having only sold one set at the exhibition Andre returned the unsold bricks to the brickworks for a refund. When he was approached six years later by the Tate, Andre was unable to source the same bricks again due the brickworks closure. Instead of supplying the original ‘bluish white’ bricks he supplied a substitute ‘yellowy- brown’ set. Using Carl Andre’s missing bricks as a starting point, Andre de Jong, Andrew Lacon and Cathy Wade produced and exhibited new work in Bushwick, Brooklyn for Exchange Rates, which was developed to form the basis of this publication. The work later went on to be exhibited in London .