MASTERPIECE - The new thriller by JOHN JOYCE A nuclear weapon has been planted somewhere in the Louvre Museum in Paris and the detonator is ticking . . . THE RANSOM: $100 billion in aid for the suffering millions in Africa. THE RESPONSE: While Paris is evacuated, crack police officer Gabrielle Arnault, terrorist turned academic Damien Flynn and veteran art thief Jean-Jacques Sabuat - the only man to ever crack the Louvre's computerized security system - take to the sewers to defuse the bomb and save the world's ultimate . . . . MASTERPIECE THE RESULT: A roller coaster ride into the worlds of...