Edward Hopper’s monster lurks outside the nighthawks’ diner. James Whistler’s monster rocks in her chair. Monsters invade masterpieces by Dorthea Tanning, Paul Cezanne, M.C. Escher, Jean Michel Basquiat, Giuseppe Archimboldo, Rene Magritte, Henri Rousseau, Franz Kline, Frida Kahlo, Bob Thompson, Henri Toulouse-Lautrec, Thomas Hart Benton, and Helen Frankenthaler. The monster emerging from Claude Monet’s waterlilies is unforgettable.  Our guide for this romp through re-imagined masterpieces is an engaging hamster. Thumbnail biographies of the artists identify their iconic works.